Auth bypass in Belden Hios Switch
CVE-2025-15620
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Belden Hios Switch
- Belden Hirschmann Hios Switch Platform — versions 09.1.00, 10.0.00
Weakness classification (CWE)
References
- assets.belden.com/m/702a656e81736b04/original/PSIRT-2_Web_Interface_HiOS.pdf (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/hios-switch-platform-denial-of-service-via-web-int… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-15620?
- CVE-2025-15620 is a high-severity vulnerability in Belden Hios Switch, classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-04-02.
- How severe is CVE-2025-15620?
- High severity. CVSS v3 base score is 8.6 out of 10.