Secure Firewall ASA and FTD
CVE-2025-20244: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow a remote attacker that is authenticated as a VPN user to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 3.1 7.7
EPSS0.54%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 Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.8 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.12 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.14 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.19 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.20 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.22 | See the advisory |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 6.6 | See the advisory |
| Cisco Firepower Threat Defense Software 6.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.6 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow a remote attacker that is authenticated as a VPN user to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to incomplete error checking when parsing an HTTP header field value. An attacker could exploit this vulnerability by sending a crafted HTTP request to a targeted Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause a DoS condition, which would cause the affected device to reload.
Exploitation
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.