PT-2026-22981 · Cisco · Cisco Secure Firewall Threat Defense (Ftd)+2

Alex Lumsden + 1 · Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-20103

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/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 could allow a remote, unauthenticated attacker to cause a denial of service (DoS) condition affecting new Remote Access SSL VPN connections by exhausting device memory. This issue stems from a failure to validate user-supplied input. An attacker could exploit this by sending specially crafted packets to the Remote Access SSL VPN server, potentially causing the device web interface to become unresponsive.

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

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-20103

Affected Products

Cisco Asa

Cisco Secure Firewall Asa

Cisco Secure Firewall Threat Defense (Ftd)

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-20103 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC · Vendor Advisory
• https://twitter.com/CVEnew/status/2029272807008240021 · Twitter Post
• https://twitter.com/TheHackerWire/status/2029262652288188889 · Twitter Post
• https://twitter.com/CveFindCom/status/2029266545432469672 · Twitter Post
• https://t.me/CVEtracker/46335 · Telegram Post