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CVE-2026-20349· cisco / secure firewall adaptive security appliance (asa) and secure firewall threat defense (ftd) · CWE-244
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability
Exploited in the wild. Listed by CISA on 2026-08-11; known to be used by ransomware.
1%likelihood of exploitation, next 30 days
64%of all CVEs are less likely
Nonecheck to confirm it
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.
No ready check is stored for this CVE. Confirm it by hand from the references.
References
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