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VULNERABILITIES

CVE-2026-20106 Details

Description

A vulnerability in the Remote Access SSL VPN, HTTP management and MUS functionality, of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust device memory resulting in a denial of service (DoS) condition requiring a manual reboot. This vulnerability is due to trusting user input without validation. An attacker could exploit this vulnerability by sending crafted packets to the Remote Access SSL VPN server. A successful exploit could allow the attacker to cause the device to stop responding, resulting in a DoS condition.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-401Missing Release of Memory after Effective Lifetime[email protected]

Affected Products

ProductVersions
cisco adaptive security appliance software
>= 9.12.1, < 9.16.4.85
>= 9.17.1, < 9.18.4.66
>= 9.19.1, < 9.20.4
>= 9.22.1.1, < 9.22.2.4
>= 9.23.1, < 9.23.1.7

CPE

  • cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
cisco secure firewall threat defense
>= 6.4.0, < 7.0.9
>= 7.1.0, < 7.2.11
>= 7.3.0, < 7.4.3
>= 7.6.0, < 7.6.4
>= 7.7.0, < 7.7.11

CPE

  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

9 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-20106
NVD Published Date:
Mar 4, 2026
NVD Last Modified:
Aug 11, 2026
Source:
[email protected]