CVE-2025-20265
Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability
- Published
- Aug 14, 2025
- Updated
- Feb 26, 2026
- Assigning CNA
- cisco
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 96.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
A vulnerability in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to inject arbitrary shell commands that are executed by the device. This vulnerability is due to a lack of proper handling of user input during the authentication phase. An attacker could exploit this vulnerability by sending crafted input when entering credentials that will be authenticated at the configured RADIUS server. A successful exploit could allow the attacker to execute commands at a high privilege level. Note: For this vulnerability to be exploited, Cisco Secure FMC Software must be configured for RADIUS authentication for the web-based management interface, SSH management, or both.
Sources
3- cve_2025_20265Exploit
PoC for CVE-2025-20265 Cisco Secure FMC Software RADIUS Remote Code Execution Vulnerability
- cve2025-20265Scanner
Safe Python script to detect Cisco FMC instances potentially vulnerable to CVE-2025-20265. Uses official FMC API to check version, supports single/multi-target scanning, and includes a harmless local PoC marker.
Responsible use
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