CVE-2025-20333CISA KEV
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
CISA lists this Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense vulnerability as known exploited. The vendor's advisory has the fixed versions.
CISA catalog record
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a buffer overflow vulnerability that allows for remote code execution. This vulnerability could be chained with CVE-2025-20362.
- Product
- Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
- Added to KEV
- 25 Sep 2025
- Federal remediation due
- 26 Sep 2025
- Known ransomware use
- Not reported
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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