Secure Firewall ASA and FTD
CVE-2025-20362: Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization
Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362.
Published
ExploitedYes, in CISA KEVAdded 25 Sept 2025
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 6.5
EPSS87%Chance of exploitation in 30 days
Public exploitNot tracked
FixNot yet
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23 | See the advisory |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.6 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.7 | See the advisory |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.7 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory. A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.
Exploitation
The Cisco PSIRT is aware of attempted exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability.
CISA lists this CVE as exploited in the wild since 25 Sept 2025.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.