High severity · published Sep 15, 2026
CVE-2026-89025
Hirschmann HiOS Switch Platform DoS via Malformed HTTP Request
7.5
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hirschmann HiOS Switch Platform · Belden
07.0.0 through 07.1.11; 08.0.0 through 08.7.09; 09.0.00 through 09.0.12; 09.3.00 through 09.3.02; 10.0.0 through 10.3.07; 10.4.00; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89025
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89025
vendor-advisory
https://assets.belden.com/asset/2ba884e3-c0c9-40f6-aa22-a9e852b20af4/PSIRT-6_HTTPS_Vulnerability_HiOS.pdf
third-party-advisory
https://www.vulncheck.com/advisories/hirschmann-hios-switch-platform-dos-via-malformed-http-request
More from Hirschmann HiOS Switch Platform
8.6
CVE-2025-15620
HiOS Switch Platform Denial-of-Service via Web Interface