CVE-2026-20073

Published Mar 4, 2026

Last updated 20 days ago

Overview

Description
A vulnerability in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to send traffic that should be denied through an affected device. This vulnerability is due to improper error handling when an affected device that is joining a cluster runs out of memory while replicating access control rules. An attacker could exploit this vulnerability by sending traffic that should be blocked through the device. A successful exploit could allow the attacker to bypass access controls and reach devices in protected networks.
Source
psirt@cisco.com
NVD status
Analyzed
Products
adaptive_security_appliance_software, firepower_threat_defense

Risk scores

CVSS 3.1

Type
Primary
Base score
5.8
Impact score
1.4
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Severity
MEDIUM

Weaknesses

psirt@cisco.com
CWE-284
nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

Configurations