CVE-2025-63221: Axeltechnology Puma Firmware

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

The Axel Technology puma devices (firmware versions 0.8.5 to 1.0.3) are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system settings, leading to full compromise of the device.

Affected products

• Axeltechnology Puma Firmware: from 0.8.5, up to and including 1.0.3

Published 2025-11-19. Last modified 2026-06-17.