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Hios SwitchApplication · Belden

CVE-2025-15620

HIGH · 8.6 CVSS v3.1 Published 2026-04-02
Fix available
A fix is available. Upgrade to 09.4.05 / 10.3.01 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

HiOS Switch Platform contains a denial-of-service vulnerability in its web interface where remote attackers can trigger an uncontrolled device reboot by sending a malicious HTTP GET request to a specific endpoint. This affects versions 09.1.00-09.4.04 and 10.0.00-10.3.00, causing complete service disruption and device unavailability.

MitigationOrganizations should upgrade to a HiOS version beyond the affected ranges (when available) or implement network segmentation and access controls to restrict web management interface access to trusted IP addresses only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Hios SwitchApplication
Affected:>= 09.1.00, < 09.4.05>= 10.0.00, < 10.3.01

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model
    Access the switch CLI or web interface and retrieve the device model information. Confirm it is a Belden HiOS Switch platform.
    Affected if The device is not a Belden HiOS Switch product.
  2. Retrieve the firmware version
    Access the switch CLI or web interface and retrieve the current firmware version. In CLI, this is typically shown via 'show version' or similar command. In the web interface, check the system information or status page.
    Affected if Unable to determine the firmware version from the device.
  3. Compare version against affected ranges
    Check if the installed firmware version falls within >= 09.1.00 and < 09.4.05, OR >= 10.0.00 and < 10.3.01.
    Affected if The installed version matches one of the affected version ranges.
  4. Verify web management interface is enabled
    Check the switch configuration to confirm the web HTTP/HTTPS management interface is enabled. In CLI, use 'show ip http' or 'show management' commands.
    Affected if The web management interface is enabled and accessible from the network.
  5. Assess network accessibility of the web interface
    Determine if the web interface is reachable from network segments outside the trusted management network. Check ACLs, VLANs, or firewall rules applied to the management interface.
    Affected if The web interface is accessible from untrusted network segments.

The environment is affected if the device is a Belden HiOS Switch with firmware version in the ranges 09.1.00-09.4.04 or 10.0.00-10.3.00, and the web management interface is enabled and accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 09.4.05 / 10.3.01 or later
Fixed in 09.4.0510.3.01
Interim mitigation

Organizations should upgrade to a HiOS version beyond the affected ranges (when available) or implement network segmentation and access controls to restrict web management interface access to trusted IP addresses only.

Recommended fix High confidence

Upgrade to HiOS version 09.4.05 (for 09.x branch) or 10.3.01 (for 10.x branch)

  1. Access the switch administrative interface via console or web UI
  2. Backup the current switch configuration to a secure location
  3. Download the appropriate firmware version from the vendor's support site (09.4.05 for 09.x branch or 10.3.01 for 10.x branch)
  4. Verify the firmware file integrity using checksums provided by the vendor
  5. Upload the firmware through the switch's firmware upgrade function
  6. Monitor the upgrade process and allow sufficient time for completion
  7. After reboot, verify the new firmware version is installed
  8. Restore the backed-up configuration
Caveat Review release notes for any configuration or feature changes between versions; test in staging environment before production deployment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Hios Switch Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-15620 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data