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CVE-2026-20349 — Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) contain a heap inspection vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
Vulnerability details
- Affected productsSecure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD)
- KEV remediation due2026-08-14
Related reporting
- August 2026 CVE Landscaperecordedfuture
- Cisco ASA and FTD CVE-2026-20349 Exploitedsocradar_blog
- AL26-018 - Vulnerability affecting Cisco ASA and Secure Firewall Threat Defense Software Remote Access SSL VPN - CVE-2026-20349cccs_ca
- Cisco security advisory (AV26-807)cccs_ca
- Cisco ASA and FTD Flaw Exploited in the Wild Can Trigger Remote DoSthehackernews
- Cisco Products Multiple Vulnerabilitieshkcert
- CISA Adds Three Known Exploited Vulnerabilities to Catalogcisa_advisories
- [CISA KEV] CVE-2026-20349 — Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) : Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerabilitycisa_kev
- Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerabilitycisco_psirt