What is CVE-2026-89025?

CVE-2026-89025 is a high-severity vulnerability in Belden Hirschmann Hios Switch Platform, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2026-09-15.

How severe is CVE-2026-89025?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Belden Hirschmann Hios Switch Platform

CVE-2026-89025

Hirschmann HiOS Switch Platform devices contain a denial-of-service vulnerability in the integrated web server due to missing validation of HTTP(S) content. A remote unauthenticated attacker can send a specially crafted HTTP(S) request to a specific endpoint that is processed incorrectly, causing the device to perform an unintended reboot and resulting in a temporary denial-of-service condition. This vulnerability has been addressed in versions 07.1.12, 08.7.10, 09.0.13, 09.3.03, 10.3.08, and 10.5.00.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Belden Hirschmann Hios Switch Platform — versions 10.4.00, 10.5.00

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

disclosure@vulncheck.com (vendor-advisory, patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-89025?: CVE-2026-89025 is a high-severity vulnerability in Belden Hirschmann Hios Switch Platform, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2026-09-15.
How severe is CVE-2026-89025?: High severity. CVSS v3 base score is 7.5 out of 10.