CVE-2026-20331

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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN

Configurations

No configuration.

History

16 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 17:17

Updated : 2026-09-18 20:17

NVD link : CVE-2026-20331

Mitre link : CVE-2026-20331

CVE.ORG link : CVE-2026-20331

JSON object : View

Products Affected

No product.

CWE

CWE-693

Protection Mechanism Failure

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"affected", "version": "9.16.4.14"}, {"status": "affected", "version": "9.18.3"}, {"status": "affected", "version": "9.16.4.18"}, {"status": "affected", "version": "9.18.3.39"}, {"status": "affected", "version": "9.16.4.19"}, {"status": "affected", "version": "9.18.3.46"}, {"status": "affected", "version": "9.16.4.27"}, {"status": "affected", "version": "9.18.3.53"}, {"status": "affected", "version": "9.18.3.55"}, {"status": "affected", "version": "9.16.4.38"}, {"status": "affected", "version": "9.16.4.39"}, {"status": "affected", "version": "9.18.3.56"}, {"status": "affected", "version": "9.20.1"}, {"status": "affected", "version": "9.16.4.42"}, {"status": "affected", "version": "9.18.4"}, {"status": "affected", "version": "9.20.1.5"}, {"status": "affected", "version": "9.18.4.5"}, {"status": "affected", "version": "9.16.4.48"}, {"status": "affected", "version": "9.18.4.8"}, {"status": "affected", "version": "9.20.2"}, {"status": "affected", "version": "9.16.4.55"}, {"status": "affected", "version": "9.18.4.22"}, {"status": "affected", "version": "9.20.2.10"}, {"status": "affected", "version": "9.16.4.57"}, {"status": "affected", "version": "9.18.4.24"}, {"status": "affected", "version": "9.20.2.21"}, {"status": "affected", "version": "9.16.4.61"}, {"status": "affected", "version": "9.18.4.29"}, {"status": "affected", "version": "9.20.2.22"}, {"status": "affected", "version": "9.16.4.62"}, {"status": "affected", "version": "9.18.4.34"}, {"status": "affected", "version": "9.20.3"}, {"status": "affected", "version": "9.16.4.67"}, {"status": "affected", "version": "9.16.4.70"}, {"status": "affected", "version": "9.18.4.40"}, {"status": "affected", "version": "9.23.1"}, {"status": "affected", "version": "9.22.1.1"}, {"status": "affected", "version": "9.16.4.71"}, {"status": "affected", "version": "9.20.3.4"}, {"status": "affected", "version": "9.18.4.47"}, {"status": "affected", "version": "9.20.3.7"}, {"status": "affected", "version": "9.16.4.76"}, {"status": "affected", "version": "9.20.3.9"}, {"status": "affected", "version": "9.18.4.50"}, {"status": "affected", "version": "9.22.1.3"}, {"status": "affected", "version": "9.20.3.10"}, {"status": "affected", "version": "9.22.1.2"}, {"status": "affected", "version": "9.18.4.52"}, {"status": "affected", "version": "9.20.3.13"}, {"status": "affected", "version": "9.22.1.6"}, {"status": "affected", "version": "9.18.4.53"}, {"status": "affected", "version": "9.16.4.82"}, {"status": "affected", "version": "9.22.2"}, {"status": "affected", "version": "9.20.3.16"}, {"status": "affected", "version": "9.19.1.42"}, {"status": "affected", "version": "9.18.4.57"}, {"status": "affected", "version": "9.16.4.84"}, {"status": "affected", "version": "9.23.1.3"}, {"status": "affected", "version": "9.20.3.20"}, {"status": "affected", "version": "9.22.2.4"}, {"status": "affected", "version": "9.23.1.7"}, {"status": "affected", "version": "9.20.4"}, {"status": "affected", "version": "9.22.2.9"}, {"status": "affected", "version": "9.23.1.13"}, {"status": "affected", "version": "9.20.4.7"}, {"status": "affected", "version": "9.22.2.13"}, {"status": "affected", "version": "9.18.4.66"}, {"status": "affected", "version": "9.20.4.10"}, {"status": "affected", "version": "9.23.1.19"}, {"status": "affected", "version": "9.16.4.85"}, {"status": "affected", "version": "9.22.2.14"}, {"status": "affected", "version": "9.18.4.67"}, {"status": "affected", "version": "9.24.1"}, {"status": "affected", "version": "9.18.4.68"}, {"status": "affected", "version": "9.23.1.22"}, {"status": "affected", "version": "9.20.4.14"}, {"status": "affected", "version": "9.22.2.20"}, {"status": "affected", "version": "9.18.4.71"}, {"status": "affected", "version": "9.20.4.19"}, {"status": "affected", "version": "9.23.1.26"}, {"status": "affected", "version": "9.16.4.89"}, {"status": "affected", "version": "9.22.2.32"}, {"status": "affected", "version": "9.18.4.76"}, {"status": "affected", "version": "9.22.3"}, {"status": "affected", "version": "9.24.1.5"}, {"status": "affected", "version": "9.20.4.22"}, {"status": "affected", "version": "9.24.1.9"}, {"status": "affected", "version": "9.20.4.28"}, {"status": "affected", "version": "9.22.3.5"}, {"status": "affected", "version": "9.16.4.92"}, {"status": "affected", "version": "9.18.4.135"}, {"status": "affected", "version": "9.23.1.195"}, {"status": "affected", "version": "9.20.4.30"}, {"status": "affected", "version": "9.24.1.155"}, {"status": "affected", "version": "9.23.1.32"}, {"status": "affected", "version": "9.24.1.11"}, {"status": "affected", "version": "9.20.4.34"}, {"status": "affected", "version": "9.18.4.82"}, {"status": "affected", "version": "9.24.10"}, {"status": "affected", "version": "9.20.4.235"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Secure Firewall Management Center (FMC)", "versions": [{"status": "affected", "version": "7.0.0"}, {"status": "affected", "version": "7.0.0.1"}, {"status": "affected", "version": "7.0.1"}, {"status": "affected", "version": "7.0.1.1"}, {"status": "affected", "version": "7.0.2"}, {"status": "affected", "version": "7.2.0"}, {"status": "affected", "version": "7.0.2.1"}, {"status": "affected", "version": "7.0.3"}, {"status": "affected", "version": "7.2.0.1"}, {"status": "affected", "version": "7.0.4"}, {"status": "affected", "version": "7.2.1"}, {"status": "affected", "version": "7.0.5"}, {"status": "affected", "version": "7.3.0"}, {"status": "affected", "version": "7.2.2"}, {"status": "affected", "version": "7.3.1"}, {"status": "affected", "version": "7.2.3"}, {"status": "affected", "version": "7.2.3.1"}, {"status": "affected", "version": "7.2.4"}, {"status": "affected", "version": "7.0.6"}, {"status": "affected", "version": "7.2.4.1"}, {"status": "affected", "version": "7.2.5"}, {"status": "affected", "version": "7.3.1.1"}, {"status": "affected", "version": "7.4.0"}, {"status": "affected", "version": "7.0.6.1"}, {"status": "affected", "version": "7.2.5.1"}, {"status": "affected", "version": "7.4.1"}, {"status": "affected", "version": "7.2.6"}, {"status": "affected", "version": "7.4.1.1"}, {"status": "affected", "version": "7.0.6.2"}, {"status": "affected", "version": "7.2.7"}, {"status": "affected", "version": "7.2.5.2"}, {"status": "affected", "version": "7.3.1.2"}, {"status": "affected", "version": "7.2.8"}, {"status": "affected", "version": "7.6.0"}, {"status": "affected", "version": "7.4.2"}, {"status": "affected", "version": "7.2.8.1"}, {"status": "affected", "version": "7.0.6.3"}, {"status": "affected", "version": "7.4.2.1"}, {"status": "affected", "version": "7.2.9"}, {"status": "affected", "version": "7.0.7"}, {"status": "affected", "version": "7.7.0"}, {"status": "affected", "version": "7.4.2.2"}, {"status": "affected", "version": "7.2.10"}, {"status": "affected", "version": "7.6.1"}, {"status": "affected", "version": "7.4.2.3"}, {"status": "affected", "version": "7.0.8"}, {"status": "affected", "version": "7.6.2"}, {"status": "affected", "version": "7.7.10"}, {"status": "affected", "version": "7.2.10.1"}, {"status": "affected", "version": "7.0.8.1"}, {"status": "affected", "version": "7.6.2.1"}, {"status": "affected", "version": "7.2.10.2"}, {"status": "affected", "version": "7.7.10.1"}, {"status": "affected", "version": "7.4.2.4"}, {"status": "affected", "version": "7.4.3"}, {"status": "affected", "version": "7.6.3"}, {"status": "affected", "version": "7.7.11"}, {"status": "affected", "version": "7.6.4"}, {"status": "affected", "version": "10.0.0"}, {"status": "affected", "version": "7.4.4"}, {"status": "affected", "version": "7.4.5"}, {"status": "affected", "version": "7.0.9"}, {"status": "affected", "version": "7.2.11"}, {"status": "affected", "version": "7.7.12"}, {"status": "affected", "version": "7.6.5"}, {"status": "affected", "version": "7.4.6"}, {"status": "affected", "version": "10.0.1"}, {"status": "affected", "version": "7.4.7"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Secure Firewall Threat Defense (FTD) Software", "versions": [{"status": "affected", "version": "7.0.0.1"}, {"status": "affected", "version": "7.0.1"}, {"status": "affected", "version": "7.0.1.1"}, {"status": "affected", "version": "7.0.2"}, {"status": "affected", "version": "7.0.2.1"}, {"status": "affected", "version": "7.0.3"}, {"status": "affected", "version": "7.0.4"}, {"status": "affected", "version": "7.0.5"}, {"status": "affected", "version": "7.3.0"}, {"status": "affected", "version": "7.3.1"}, {"status": "affected", "version": "7.0.6"}, {"status": "affected", "version": "7.3.1.1"}, {"status": "affected", "version": "7.4.0"}, {"status": "affected", "version": "7.0.6.1"}, {"status": "affected", "version": "7.4.1"}, {"status": "affected", "version": "7.0.6.2"}, {"status": "affected", "version": "7.4.1.1"}, {"status": "affected", "version": "7.3.1.2"}, {"status": "affected", "version": "7.6.0"}, {"status": "affected", "version": "7.4.2"}, {"status": "affected", "version": "7.0.6.3"}, {"status": "affected", "version": "7.4.2.1"}, {"status": "affected", "version": "7.0.7"}, {"status": "affected", "version": "7.7.0"}, {"status": "affected", "version": "7.4.2.2"}, {"status": "affected", "version": "7.6.1"}, {"status": "affected", "version": "7.4.2.3"}, {"status": "affected", "version": "7.0.8"}, {"status": "affected", "version": "7.6.2"}, {"status": "affected", "version": "7.7.10"}, {"status": "affected", "version": "7.7.11"}, {"status": "affected", "version": "7.0.8.1"}, {"status": "affected", "version": "7.6.2.1"}, {"status": "affected", "version": "7.7.10.1"}, {"status": "affected", "version": "7.4.2.4"}, {"status": "affected", "version": "7.4.3"}, {"status": "affected", "version": "7.6.4"}, {"status": "affected", "version": "10.0.0"}, {"status": "affected", "version": "7.4.4"}, {"status": "affected", "version": "7.0.9"}, {"status": "affected", "version": "7.4.7"}], "defaultStatus": "unknown"}]}], "published": "2026-09-16T17:17:17.107", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-693"}]}], "descriptions": [{"lang": "en", "value": "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.  \r\n\r\nThe 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."}], "lastModified": "2026-09-18T20:17:14.087", "sourceIdentifier": "psirt@cisco.com"}