PT-2026-23029 · Cisco · Cisco Secure Firewall Threat Defense (Ftd)+2

Published 2026-03-04 · Updated 2026-05-04 · CVE-2026-20073

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software (affected versions not specified)

Description A flaw exists in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software that may allow a remote attacker to bypass access controls and reach devices in protected networks. This issue stems from improper error handling when a device runs out of memory during access control rule replication while joining a cluster. An attacker could exploit this by sending traffic that should be blocked through the device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-20073

Affected Products

Cisco Asa

Cisco Secure Firewall Adaptive Security Appliance (Asa)

Cisco Secure Firewall Threat Defense (Ftd)

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-20073 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-aclbypass-dos-CVxVRSvQ · Vendor Advisory
• https://t.me/cveNotify/162049 · Telegram Post
• https://twitter.com/CVEnew/status/2029272781058105756 · Twitter Post