PT-2026-22977 · Cisco · Cisco Secure Firewall Ftd+1

Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-20049

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

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

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 how the software handles Galois/Counter Mode (GCM)-encrypted Internet Key Exchange version 2 (IKEv2) IPsec traffic. This could allow a remote attacker with valid credentials to trigger a denial of service (DoS) condition. The issue stems from allocating an inadequately sized memory block when processing crafted GCM-encrypted IPsec traffic. Successful exploitation may lead to an unexpected reload of the device, resulting in a DoS.

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

DoS

Weakness Enumeration

CWE-131

Related Identifiers

CVE-2026-20049

Affected Products

Cisco Secure Firewall Asa

Cisco Secure Firewall Ftd

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-20049 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-esp-dos-uv7yD8P5 · Vendor Advisory
• https://t.me/CVEtracker/46341 · Telegram Post
• https://twitter.com/CVEnew/status/2029272801564090491 · Twitter Post