Riskcovery

CVE-2025-20133

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Authentication Targeted Denial of Service Vulnerability

State
Published
Severity
8.6 High
Published
Aug 14, 2025
Updated
Aug 14, 2025
Reserved
Oct 10, 2024

Read the record on cve.org

Description

A vulnerability in the management and VPN web servers of the Remote Access SSL VPN feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly stop responding, resulting in a DoS condition.

This vulnerability is due to ineffective validation of user-supplied input during the Remote Access SSL VPN authentication process. An attacker could exploit this vulnerability by sending a crafted request to the VPN service on an affected device. A successful exploit could allow the attacker to cause a DoS condition where the device stops responding to Remote Access SSL VPN authentication requests.

Scores

CVSSScoreVectorSource
3.18.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hcisco

Weaknesses

  • CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

ProductVersions
Cisco Adaptive Security Appliance (ASA) SoftwareCisco
  • 9.12.3Affected
  • 9.8.3Affected
  • 9.12.1Affected
  • 9.12.2Affected
  • 9.8.2.45Affected
  • 9.8.4Affected
  • 9.14.1Affected
  • 9.12.4Affected
  • 9.8.2.35Affected
  • 9.8.2.28Affected
  • 9.8.2.33Affected
  • 9.8.2.38Affected
  • 9.8.4.25Affected
  • 9.12.3.2Affected
  • 9.12.3.7Affected
  • 9.8.3.18Affected
  • 9.8.3.14Affected
  • 9.8.4.15Affected
  • 9.8.4.8Affected
  • 9.8.3.29Affected
  • 9.14.1.10Affected
  • 9.12.2.5Affected
  • 9.8.4.22Affected
  • 9.12.3.12Affected
  • 9.8.4.7Affected
  • and 164 more versions
Cisco Firepower Threat Defense SoftwareCisco
  • 6.2.3.14Affected
  • 6.4.0.1Affected
  • 6.2.3.7Affected
  • 6.4.0.2Affected
  • 6.2.3.9Affected
  • 6.2.3.1Affected
  • 6.2.3.2Affected
  • 6.4.0.5Affected
  • 6.2.3.10Affected
  • 6.4.0Affected
  • 6.4.0.3Affected
  • 6.2.3.6Affected
  • 6.4.0.4Affected
  • 6.2.3.15Affected
  • 6.2.3.5Affected
  • 6.2.3.4Affected
  • 6.2.3.3Affected
  • 6.2.3.8Affected
  • 6.4.0.6Affected
  • 6.2.3.11Affected
  • 6.2.3.12Affected
  • 6.2.3.13Affected
  • 6.4.0.7Affected
  • 6.4.0.8Affected
  • 6.6.0Affected
  • and 62 more versions

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.