CVE-2026-20349
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 an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.6
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS probability
- 2.21%
- CISA KEV
- Known exploited vulnerability
- CWE
- CWE-244
- Published
- 2026-08-11
- Last modified
- 2026-08-12
Affected products
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Weakness type
Related vulnerabilities
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