Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-89025Hirschmann HiOS Switch Platform DoS via Malformed HTTP Request

High 7.5

In plain English

A high-severity security flaw in Hirschmann HiOS Switch Platform from Belden. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.8%top 44.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Belden	Hirschmann HiOS Switch Platform	07.0.0 – through 07.1.1108.0.0 – through 08.7.0909.0.00 – through 09.0.1209.3.00 – through 09.3.02

Weakness: CWE-755 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Belden Security Advisory vendor-advisory, patch
https://www.vulncheck.com/advisories/hirschmann-hios-switch-platform-dos-via-malformed-http-request third-party-advisory