Cisco Secure Adaptive Security Appliance Software protection mechanism

Summaryinfo

A vulnerability has been found in Cisco Secure Adaptive Security Appliance Software, Secure Firewall Management Center Software and Secure Firewall Threat Defense Software and classified as very critical. This affects an unknown part. This manipulation causes protection mechanism. This vulnerability is registered as CVE-2026-20331. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as very critical was found in Cisco Secure Adaptive Security Appliance Software, Secure Firewall Management Center Software and Secure Firewall Threat Defense Software (the affected version unknown). Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a protection mechanism vulnerability. The CWE definition for the vulnerability is CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2026-20331 since 10/08/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/16/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• Secure Adaptive Security Appliance Software
• Secure Firewall Management Center Software
• Secure Firewall Threat Defense Software

License

• commercial

Website

• Vendor: https://www.cisco.com/

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