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Stack-based Buffer OverflowWeakness · CWE-121

CVE-2025-3711

CRITICAL · 9.8 CVSS v3.1 Published 2025-05-09
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
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
The LCD KVM over IP Switch CL5708IM has a Stack-based Buffer Overflow vulnerability in firmware versions prior to v2.2.215, allowing unauthenticated remote attackers to exploit this vulnerability to execute arbitrary code on the device.

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

The CL5708IM LCD KVM over IP Switch contains a stack-based buffer overflow vulnerability in its firmware prior to v2.2.215. Unauthenticated remote attackers can exploit this flaw to execute arbitrary code on the device, potentially gaining full control of the KVM switch and any connected systems.

MitigationUpdate the device firmware to version v2.2.215 or later to remediate this vulnerability. Since this is a critical unauthenticated remote code execution vulnerability, prioritize patching given the CVSS 9.8 score.

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

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
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
    Locate the physical CL5708IM LCD KVM over IP Switch or check network inventory for this specific model number. Confirm the device is a CL5708IM and not a different KVM model.
    Affected if The device is not a CL5708IM model, this CVE does not apply.
  2. Determine the installed firmware version
    Access the KVM switch web interface or console and navigate to the firmware/version information page. Alternatively, check the device dashboard or system information section for the current firmware build number.
    Affected if Unable to retrieve firmware version from the device interface.
  3. Compare firmware version against affected range
    Compare the installed firmware version number to v2.2.215. The vulnerability affects all versions prior to v2.2.215. Check if the version string indicates a build number lower than 215 or a version date earlier than the v2.2.215 release.
    Affected if Firmware version is below v2.2.215 (for example, v2.2.200, v2.2.108, or any earlier release).
  4. Assess network exposure
    Determine if the KVM switch is network-accessible from untrusted networks. Check if the web management interface is exposed to the internet or accessible without VPN authentication.
    Affected if The device management interface is directly accessible from untrusted networks, increasing exploitation likelihood.

You are affected if the device is a CL5708IM LCD KVM over IP Switch running firmware version lower than v2.2.215, especially if network-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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update the device firmware to version v2.2.215 or later to remediate this vulnerability. Since this is a critical unauthenticated remote code execution vulnerability, prioritize patching given the CVSS 9.8 score.

Recommended fix High confidence

v2.2.215

  1. 1. Identify the current firmware version of the LCD KVM over IP Switch CL5708IM by accessing the device management interface or checking the device status page.
  2. 2. Navigate to the firmware update or maintenance section of the device web interface.
  3. 3. Download the firmware v2.2.215 or later from the official ATEN vendor website or support portal.
  4. 4. Follow the vendor's documented firmware upgrade procedure, ensuring stable power during the update process.
  5. 5. After the upgrade completes, verify the new firmware version is v2.2.215 or later.
  6. 6. Confirm the vulnerability is remediated by reviewing the device firmware release notes for the security fix.

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

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
11.0 hours of engineering $2,000
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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-2025-3711 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