CVE-2025-20244
published 2025-08-14CVE-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…
PriorityP344high7.7CVSS 3.1
AVNACLPRLUINSCCNINAH
EPSS
0.50%
39.6th percentile
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.
Affected
299 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
CVSS provenance
nvdv3.17.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
vendor_cisco7.7HIGH
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Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
vendor_cisco·2025-08-14·CVSS 7.7
CVE-2025-20244 [HIGH] CWE-1287 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
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 co
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20244 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
CVE-2025-20244: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access VPN Web Server Denial of Service Vulnerability
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
GHSA
GHSA-jj2c-3m89-73r8: A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Th
ghsa_unreviewed·2025-08-14
CVE-2025-20244 [HIGH] CWE-1287 GHSA-jj2c-3m89-73r8: A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Th
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.
No detection rules found.
No public exploits indexed.
2025-08-14
Published