CVE-2025-20244
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow a remote attacker that is authenticated as a VPN user to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to incomplete error checking when parsing an HTTP header field value. An attacker could exploit this vulnerability by sending a crafted HTTP request to a targeted Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause a DoS condition, which would cause the affected device to reload.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.7
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- EPSS probability
- 0.51%
- CWE
- CWE-1287
- Published
- 2025-08-14
- Last modified
- 2026-03-12
Affected products
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
- Cisco Cisco Adaptive Security Appliance (ASA) Software
Weakness type
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