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-2026-20336 are related to issues concerning improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
Published: 2026-09-16
Score: 8.8 High
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 secure Firewall Management Center
Cisco secure Firewall Threat Defense
Vendors & Products Cisco
Cisco adaptive Security Appliance Software
Cisco secure Firewall Management Center
Cisco secure Firewall Threat Defense

Thu, 17 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 16 Sep 2026 20:30:00 +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. The vulnerabilities tracked by CVE-2026-20336 are related to issues concerning improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
Title Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Resource Lifetime Management Vulnerabilities
Weaknesses CWE-664
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Cisco Adaptive Security Appliance Software Secure Firewall Management Center Secure Firewall Threat Defense
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-09-18T19:10:51.077Z

Reserved: 2025-10-08T11:59:15.413Z

Link: CVE-2026-20336

cve-icon Vulnrichment

Updated: 2026-09-17T14:53:17.450Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-16T21:17:11.350

Modified: 2026-09-18T20:17:15.220

Link: CVE-2026-20336

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T22:36:07Z

Weaknesses
  • CWE-664

    Improper Control of a Resource Through its Lifetime