April 24, 2024 · Applied Cybernetics Group
CVE-2024-20353 — Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Cisco ASA and FTD Denial of Service Vulnerability
- Added to KEV
2024-04-24- Federal due date
2024-05-01- Vendor
- Cisco
- Product
- Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
- EPSS
- 99.3th percentile (score 0.707, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- ATT&CK
- T1037 , T1190 , T1608.001 , T1653 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2024-20353
CISA short description
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an infinite loop vulnerability that can lead to remote denial of service condition.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.