CVE-2025-20133
Published: Aug 14, 2025
Modified: Aug 14, 2025
CVSS v3.1
8.6
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.
| Vendor | Product | Versions |
|---|---|---|
Cisco | Cisco Adaptive Security Appliance (ASA) Software | affected 9.12.3affected 9.8.3affected 9.12.1affected 9.12.2affected 9.8.2.45+184 more versions |
Cisco | Cisco Firepower Threat Defense Software | affected 6.2.3.14affected 6.4.0.1affected 6.2.3.7affected 6.4.0.2affected 6.2.3.9+82 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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