Protection mechanism failure in Cisco Firewall Threat Defense (FTD) - CVE-2026-20007
Published: March 4, 2026
Vulnerability identifier: #VU123534
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N]
CVE-ID: CVE-2026-20007
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass configured Snort rules.
The vulnerability exists due to a logic error in the integration of the Snort Engine rules. A remote attacker can bypass configured Snort rules and allow traffic onto the network that should have been dropped.
Affected software
Cisco Firewall Threat Defense (FTD)
How to mitigate CVE-2026-20007
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 7.0.9, 7.2.11, 7.4.3, 7.6.4, 7.7.10