CVE-2025-20222HIGH 8.6EPSS p42.5%
CVE-2025-20222CVE-2025-20222
Description
A vulnerability in the RADIUS proxy feature for the IPsec VPN feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
This vulnerability is due to improper processing of IPv6 packets. An attacker could exploit this vulnerability by sending IPv6 packets over an IPsec VPN connection to an affected device. A successful exploit could allow the attacker to trigger a reload of the device, resulting in a DoS condition.
Scoring
| CVSS 3.1 | 8.6 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| EPSS | 0.57% probability of exploitation · percentile 42.5% · 2026-06-18T12:00:27Z |
| Published | 2025-08-14 |
| Last modified | 2026-04-15 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')cwe-120 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.