Cisco security advisory (AV26-807)
Brief
Serial number: AV26-807 Date: August 12, 2026
As of August 11, 2026, Cisco is affected by a vulnerability in the following products:
- Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- multiple versions
- Cisco Secure Firewall Threat Defense (FTD) Software
- multiple versions
The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.
On August 11, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-20349 to their Known Exploited Vulnerabilities (KEV) Database.
- Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability
- Cisco Security Advisories
- CISA KEV: CVE-2026-20349
Cisco security advisory (AV26-807) - Canadian Centre for Cyber Security