#VU123652 Improper access control in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2026-20073

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Main Vulnerability Database Vulnerabilities #VU123652

#VU123652 Improper access control in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2026-20073

Published: March 9, 2026


Vulnerability identifier: #VU123652
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2026-20073
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper error handling when an affected device that is joining a cluster runs out of memory while replicating access control rules. A remote attacker can bypass implemented access controls and reach devices in protected networks.


Remediation

Install updates from vendor's website.

External links