Buffer overflow in Cisco Firepower Threat Defense Software

CVE-2025-20222

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 attack…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (35.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-20222?
CVE-2025-20222 is a high-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2025-08-14.
How severe is CVE-2025-20222?
High severity. CVSS v3 base score is 8.6 out of 10.