CVE-2025-20333CRITICAL 9.9CISA KEVEPSS p97.9%
CVE-2025-20333Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
Cisco / Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
Description
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.
Scoring
| CVSS 3.1 | 9.9 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 29.20% probability of exploitation · percentile 97.9% · 2026-06-18T12:00:27Z |
| Published | 2025-09-25 |
| Last modified | 2025-10-28 |
CISA KEV entry
Added to KEV: 2025-09-25
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')cwe-120 | 0% | live |
(incoming)1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| KEVEntry | Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerabilitykev-cve-2025-20333 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.