CVE-2026-20050 Cisco Secure Firewall Threat Defense Decryption Policy Denial of Service Vulnerability
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-20050?
CVE-2026-20050 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense, published on 4 Mar 2026.
Official description
A vulnerability in the Do Not Decrypt exclusion feature of the SSL decryption feature of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management during the inspection of TLS 1.2 encrypted traffic. An attacker could exploit this vulnerability by sending crafted TLS 1.2 encrypted traffic through an affected device. A successful exploit could allow the attacker to cause a reload of an affected device. Note: This vulnerability only affects traffic that is encrypted by TLS 1.2. Other versions of TLS are not affected.
Weakness: CWE-404
Which versions are affected by CVE-2026-20050?
It affects 1 product.
Products include Cisco Secure Firewall Threat Defense.
How do I fix CVE-2026-20050?
No fix has been published for CVE-2026-20050 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20050 being exploited?
There is no known exploitation of CVE-2026-20050 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Threat Defense
- CVE-2024-20412 Hardcoded credentials in Cisco Firepower Threat Defense Software
- CVE-2024-20330 Memory corruption in Cisco Firepower Threat Defense Software
- CVE-2024-20339 Cisco Firepower Threat Defense Software for Firepower 2100 Series TLS Denial of Service Vulnerability
- CVE-2024-20351 Cisco Firepower Threat Defense Software Snort Firewall Denial of Service Vulnerability
- CVE-2023-20083 Denial of service in Cisco Firepower Threat Defense Software
Sources
Also known as GHSA-pvq2-4ff4-p9w6.