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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.008 (55.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Belden Hirschmann Hisecos Classic Firewall (Eagle, Eagle One) — versions 05.3.03, 0
Weakness classification (CWE)
References
- assets.belden.com/m/2d5657b3e5d721c6/original/Security-Bulletin-RADIUS-Authenti… (vendor-advisory)
- www.vulncheck.com/advisories/hirschmann-hisecos-buffer-overflow-via-https-login (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.