Buffer overflow in Belden Hirschmann Hisecos Classic Firewall (Eagle, Eagle One)
CVE-2018-25237
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.
Vulnerability class: Buffer Overflow
EPSS: 0.008 (53.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Belden Hirschmann Hisecos Classic Firewall (Eagle, Eagle One) — versions 05.3.03, 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2018-25237?
- CVE-2018-25237 is a critical-severity vulnerability in Belden Hirschmann Hisecos Classic Firewall (Eagle, Eagle One), classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-04-03.
- How severe is CVE-2018-25237?
- Critical severity. CVSS v3 base score is 9.8 out of 10.