How severe is CVE-2025-15620?

CVE-2025-15620 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-15620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15620?

CVE-2025-15620 affects Belden Hios Switch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15620?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-15620 have an EU (EUVD) identifier?

Yes. CVE-2025-15620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209199.

When was CVE-2025-15620 published?

CVE-2025-15620 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2025-15620

CVE-2025-15620 is a high-severity vulnerability in Belden Hios Switch with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v4: 9.2
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209199
Weakness: CWE-306
Affected product: Belden Hios Switch
Published: 2026-04-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-15620?: CVE-2025-15620 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-15620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15620?: CVE-2025-15620 affects Belden Hios Switch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15620?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-15620 have an EU (EUVD) identifier?: Yes. CVE-2025-15620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209199.
When was CVE-2025-15620 published?: CVE-2025-15620 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:belden:hios_switch:*:*:*:*:*:*:*:*

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