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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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-03 | Updated 2026-05-14 | Assigner VulnCheck




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Product status

Default status
affected

05.3.03 (custom)
unaffected

Any version
affected

References

assets.belden.com/...RADIUS-Authentication-BSECV-2018-04.pdf vendor-advisory

www.vulncheck.com/...hisecos-buffer-overflow-via-https-login third-party-advisory

cve.org (CVE-2018-25237)

nvd.nist.gov (CVE-2018-25237)

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