CVE-2026-20331: Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Protection Mechanism Failure Vulnerabilities
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20331 are related to the failure of protection mechanisms issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-693.
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit the issues covered by this CVE?
The supplied CVSS vector indicates adjacent-network attack access, low attack complexity, no privileges required, and no user interaction required. It also indicates that successful exploitation can affect resources beyond the vulnerable security authority.
What is the potential impact of successful exploitation?
The CVSS vector indicates high confidentiality and integrity impact and low availability impact. The overall severity is critical, with a CVSS score of 9.6.
Are these vulnerabilities publicly attributed to external researchers?
No. The description states that the issues were discovered internally during Cisco's security review and are addressed through a software hardening release.