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OS Command InjectionWeakness · CWE-78

CVE-2025-65008

CRITICAL · 9.4 CVSS v4.0 Published 2025-12-18
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
99/100
Remediation priority · Urgent
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
In WODESYS WD-R608U router (also known as WDR122B V2.0 and WDR28) due to lack of validation in the langGet parameter in the adm.cgi endpoint, the malicious attacker can execute system shell commands. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only version WDR28081123OV1.01 was tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.

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

OS command injection vulnerability in WODESYS WD-R608U router (WDR122B V2.0/WDR28) adm.cgi endpoint. The langGet parameter lacks input validation, allowing unauthenticated attackers to inject and execute arbitrary system shell commands.

MitigationSince no vendor patch is available, restrict external access to the router's admin interface via firewall rules or network segmentation, and monitor for indicators of compromise. Consider replacing the device if firmware updates are not forthcoming.

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
Adjacent
Complexity
Low
Privileges
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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 and firmware version
    Access the router's web interface or check the device label for model number WD-R608U, WDR122B V2.0, or WDR28. Look for firmware version information in the admin panel under System or Status settings.
    Affected if The device is a WODESYS WD-R608U router (WDR122B V2.0 or WDR28) and the firmware version matches the affected release.
  2. Verify the adm.cgi endpoint is accessible
    Attempt to access http://[router-ip]/cgi-bin/adm.cgi from an internal network location. Check if the endpoint responds to HTTP requests.
    Affected if The adm.cgi endpoint is reachable and responds to requests, indicating the web interface is active.
  3. Check if the langGet parameter is accepted
    Send a crafted request to the adm.cgi endpoint with a test value in the langGet parameter (e.g., GET /cgi-bin/adm.cgi?langGet=test). Observe if the parameter is processed without error.
    Affected if The langGet parameter is accepted and processed by the adm.cgi endpoint, meaning input validation may not be enforced.
  4. Look for signs of unauthorized command execution
    Review router logs (typically found in Admin > System Log or /var/log) for unexpected commands, suspicious shell invocations, or unauthorized configuration changes. Check for unknown processes or scripts in the system.
    Affected if Router logs or system files show evidence of unexpected shell commands, unauthorized configuration modifications, or unfamiliar processes that were not initiated by legitimate administrators.
  5. Check for unauthorized admin accounts or configuration changes
    Access the router's admin panel and review User Management or Administrator settings for unknown accounts. Check for unexpected port forwardings, firewall rule changes, or DNS modifications.
    Affected if Unknown administrator accounts exist, or configuration changes (port forwards, DNS servers, firewall rules) are present that were not made by authorized personnel.

A user is affected if they operate a WODESYS WD-R608U router (WDR122B V2.0 or WDR28) with the adm.cgi web interface accessible and the langGet parameter accepting unvalidated input, or if evidence of unauthorized command execution appears in system logs or configurations.

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

Since no vendor patch is available, restrict external access to the router's admin interface via firewall rules or network segmentation, and monitor for indicators of compromise. Consider replacing the device if firmware updates are not forthcoming.

Recommended fix Low confidence
  1. If remote administration is not required, disable web-based management interface access from the internet via router firewall settings
  2. If remote administration is needed, restrict access to the adm.cgi endpoint to trusted IP addresses only using access control lists
  3. Implement network segmentation to isolate the router from sensitive internal systems
  4. Monitor network traffic for suspicious requests to adm.cgi with unusual langGet parameter values
  5. Contact WODESYS vendor directly to request firmware security updates and timeline for patch release
  6. Consider replacing the affected router with an alternative model from a vendor that provides regular security updates

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

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2025-65008 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