PT-2026-23011 · Cisco · Cisco Secure Firewall Asa+1

Published 2026-03-04 · Updated 2026-05-04 · CVE-2026-20082

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 (affected versions not specified)

Description A flaw exists in how the software manages initial TCP connections under a TCP SYN flood attack. This could allow a remote, unauthenticated attacker to disrupt incoming TCP connections, including remote management access and Remote Access VPN (RAVPN) connections, leading to a denial of service (DoS) condition. The issue is due to improper handling of new, incoming TCP connections destined for management or data interfaces during a TCP SYN flood. An attacker could exploit this by sending a crafted stream of traffic to the device.

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

DoS

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-772

Related Identifiers

CVE-2026-20082

Affected Products

Cisco Asa

Cisco Secure Firewall Asa

References · 8

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-dos-FCvLD6vR · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20082 · Security Note
• https://twitter.com/CVEnew/status/2029272799517229253 · Twitter Post
• https://t.me/CVEtracker/46343 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2029287721022144637 · Twitter Post
• https://t.me/cveNotify/162044 · Telegram Post
• https://twitter.com/TheHackerWire/status/2029270587915550742 · Twitter Post
• https://twitter.com/CveFindCom/status/2029266485802057744 · Twitter Post