CVE-2025-15620: Belden Hios Switch

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

HiOS Switch Platform versions 09.1.00 through 09.4.04 and 10.0.00 through 10.3.00 contain a denial-of-service vulnerability in the web interface that allows remote attackers to reboot the affected device by sending a malicious HTTP GET request to a specific endpoint. Attackers can trigger an uncontrolled reboot condition through crafted HTTP requests to cause service disruption and unavailability of the switch.

Affected products

• Belden Hios Switch: from 09.1.00, before 09.4.05 (fixed in 09.4.05); from 10.0.00, before 10.3.01 (fixed in 10.3.01)

Published 2026-04-02. Last modified 2026-07-24.