What’s Vulnerable › Vulnerabilities

CVE-2018-25237: Hirschmann HiSecOS Buffer Overflow via HTTPS Login

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-03 · updated 2026-07-21
• Weakness: CWE-120

Description

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): through 05.3.02

References

• https://assets.belden.com/m/2d5657b3e5d721c6/original/Security-Bulletin-RADIUS-Authentication-BSECV-2018-04.pdf
• https://www.vulncheck.com/advisories/hirschmann-hisecos-buffer-overflow-via-https-login

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