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

This month

HIGH 8.6REMOTEUPGRADE

CVE-2025-15620 is a high-severity flaw (CVSS 8.6) affecting hios switch. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-04-02
Last modified	2026-07-24

Publisher (CNA): VulnCheck · Vendor: belden

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-02 21:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

belden hios switch UPGRADE

Affected: >= 09.1.00 and < 09.4.05 · >= 10.0.00 and < 10.3.01

Fixed in: 09.4.05, 10.3.01

Safe to downgrade to: a release before 09.1.00

1. Check installed version

apt-cache policy hios-switch || rpm -q hios-switch || hios-switch --version

2. UPGRADE to 09.4.05 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hios-switch

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hios-switch

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 09.1.00 (Debian / Ubuntu)

apt-cache madison hios-switch sudo apt install hios-switch=<VERSION_BEFORE_09.1.00> sudo apt-mark hold hios-switch

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hios-switch sudo dnf downgrade hios-switch-<VERSION_BEFORE_09.1.00> sudo dnf versionlock add hios-switch

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-15620?

hios switch: upgrade to 09.4.05, 10.3.01. Exact commands for each OS are on this page.

Is CVE-2025-15620 being exploited?

CVE-2025-15620 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-15620 affect?

CVE-2025-15620 affects hios switch. Severity is high (CVSS 8.6). 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 requ

How urgent is CVE-2025-15620?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

References

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