CVE-2024-20481
Cisco ASA and FTD Denial-of-Service Vulnerability
Cisco · Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Vulnerability details
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a missing release of resource after effective lifetime vulnerability that could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) of the RAVPN service.
Added to CISA KEV: 2024-10-24
Ransomware campaign use: Unknown
CISA due date: 2024-11-14
Defensive guidance from CISA
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC