Secure Firewall ASA and FTD
CVE-2023-20071: Multiple Cisco products are affected by a in Cisco Firepower Threat Defense Software, Cisco Umbrella Insights Virtual Appliance and others
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 5.8
EPSS0.52%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 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 6.2 | 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 6.2 | 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 6.2 | 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 6.6 | 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 6.6 | 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 6.6 | 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 6.6 | 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 6.4 | 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 6.4 | 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 6.4 | 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 6.4 | 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 6.4 | 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 6.7 | See the advisory |
| Cisco Firepower Threat Defense Software 6.7 | See the advisory |
| Cisco Firepower Threat Defense Software 6.7 | See the advisory |
| Cisco Firepower Threat Defense Software 6.7 | 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 7.0 | 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 7.0 | 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 7.0 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | See the advisory |
| Cisco Firepower Threat Defense Software 7.1 | 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 7.2 | 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 7.2 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Firepower Threat Defense Software 7.3 | See the advisory |
| Cisco Umbrella Insights Virtual Appliance N/A | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.0 | See the advisory |
| Cisco Cyber Vision 3.1 | See the advisory |
| Cisco Cyber Vision 3.1 | See the advisory |
| Cisco Cyber Vision 3.1 | See the advisory |
| Cisco Cyber Vision 3.2 | See the advisory |
| Cisco Cyber Vision 3.2 | See the advisory |
| Cisco Cyber Vision 3.2 | See the advisory |
| Cisco Cyber Vision 3.2 | See the advisory |
| Cisco Cyber Vision 3.2 | See the advisory |
| Cisco Cyber Vision 4.0 | See the advisory |
| Cisco Cyber Vision 4.0 | See the advisory |
| Cisco Cyber Vision 4.0 | See the advisory |
| Cisco Cyber Vision 4.0 | See the advisory |
| Cisco Cyber Vision 4.1 | See the advisory |
| Cisco Cyber Vision 4.1 | See the advisory |
| Cisco Cyber Vision 4.1 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.1 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.2 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 3.17 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 3.17 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.4 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.4 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.4 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.5 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.7 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.7 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.10 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.8 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Fuji-16.9 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Denali-16.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Denali-16.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Denali-16.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Denali-16.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Denali-16.3 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Everest-16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Everest-16.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software Everest-16.6 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload.
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.