Buffer Overflow Vulnerability in Hirschmann HiSecOS Devices
CVE-2018-25237

9.3CRITICAL

Key Information:

Vendor

Belden

Status
Hirschmann Hisecos Classic Firewall (eagle, Eagle One)
Vendor
CVE Published:
3 April 2026

What is CVE-2018-25237?

Hirschmann HiSecOS devices prior to version 05.3.03 are impacted by a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled. This issue occurs when a password longer than 128 characters is submitted, allowing remote attackers to improperly manage bounds in password handling. As a result, this exploitation can lead to device crashes or potentially enable the execution of arbitrary code, compromising the device's integrity and availability.

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Affected Version(s)

Hirschmann HiSecOS Classic Firewall (EAGLE, EAGLE One) 05.3.03

Hirschmann HiSecOS Classic Firewall (EAGLE, EAGLE One) 0 <= 05.3.02

Hirschmann HiSecOS Classic Firewall (EAGLE, EAGLE One) 05.3.03

References

https://assets.belden.com/m/2d5657b3e5d721c6/original/Sec...
vendor-advisory
https://www.vulncheck.com/advisories/hirschmann-hisecos-b...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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