Improper resource shutdown or release in Cisco Firewall Threat Defense (FTD) - CVE-2026-20050
Published: March 10, 2026
Vulnerability identifier: #VU123676
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20050
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to improper memory management within the Do Not Decrypt exclusion option of the SSL decryption feature. A remote attacker can send specially crafted TLS 1.2 encrypted traffic through an affected device and perform a denial of service attack.
Affected software
Cisco Firewall Threat Defense (FTD)
How to mitigate CVE-2026-20050
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 7.2.11, 7.4.4, 7.6.4, 7.7.11