PT-2026-22982 · Cisco · Cisco Secure Firewall Threat Defense (Ftd)+1

Jason Crowder · Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-20105

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 Secure Firewall Threat Defense (FTD) Software (affected versions not specified)

Description A flaw exists in the Remote Access SSL VPN functionality that may allow a remote attacker with a valid VPN connection to deplete device memory, leading to a denial of service (DoS) condition. The issue stems from a lack of input validation, enabling an attacker to exploit the system by transmitting specially crafted packets to the Remote Access SSL VPN server. A successful exploit could force the device to reload, resulting in a DoS condition. This does not impact the management or MUS interfaces.

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

DoS

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-20105

Affected Products

Cisco Secure Firewall Asa

Cisco Secure Firewall Threat Defense (Ftd)

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-20105 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC · Vendor Advisory
• https://twitter.com/CVEnew/status/2029272806068748748 · Twitter Post
• https://t.me/CVEtracker/46336 · Telegram Post