CVE-2018-25237: Belden Hirschmann Hisecos Classic Firewall Eagle, Eagle One

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Hirschmann HiSecOS devices versions prior to 05.3.03 contain a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled that allows remote attackers to crash the device or execute arbitrary code by submitting a password longer than 128 characters. Attackers can exploit improper bounds checking in password handling to overflow a fixed-size buffer and achieve denial of service or remote code execution.

Affected products

• Belden Hirschmann Hisecos Classic Firewall Eagle, Eagle One: up to and including 05.3.02

Published 2026-04-03. Last modified 2026-07-21.