Description
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.
Published: 2026-09-16
Score: 9.6 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 19 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco adaptive Security Appliance Software
Cisco identity Services Engine Passive Identity Connector
Cisco secure Firewall Management Center
Vendors & Products Cisco
Cisco adaptive Security Appliance Software
Cisco identity Services Engine Passive Identity Connector
Cisco secure Firewall Management Center

Wed, 16 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 16 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Description 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. &nbsp; 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.
Title Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Protection Mechanism Failure Vulnerabilities
Weaknesses CWE-693
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L'}

Subscriptions

Cisco Adaptive Security Appliance Software Identity Services Engine Passive Identity Connector Secure Firewall Management Center
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-09-18T19:09:40.117Z

Reserved: 2025-10-08T11:59:15.412Z

Link: CVE-2026-20331

cve-icon Vulnrichment

Updated: 2026-09-16T17:33:45.777Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-16T17:17:17.107

Modified: 2026-09-18T20:17:14.087

Link: CVE-2026-20331

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T22:37:30Z

Weaknesses
  • CWE-693

    Protection Mechanism Failure