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PatchSiren cyber security CVE debrief

CVE-2026-11522 Tenda CVE debrief

A vulnerability was detected in Tenda W20E 15.11.0.6. This vulnerability affects the function formSetPortMirror of the file /goform/setPortMirror. Performing a manipulation of the argument portMirrorMirroredPorts results in stack-based buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

Vendor
Tenda
Product
W20E
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Administrators and users of Tenda W20E 15.11.0.6 are advised to take immediate action to mitigate this vulnerability.

Technical summary

The vulnerability has a CVSS score of 7.4 and is classified as HIGH severity. It is caused by a stack-based buffer overflow in the formSetPortMirror function of the /goform/setPortMirror file. The vulnerability can be exploited remotely.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the /goform/setPortMirror file to prevent unauthorized manipulation.
  • Monitor network traffic for suspicious activity related to the vulnerability.

Evidence notes

The vulnerability was detected in Tenda W20E 15.11.0.6 and affects the formSetPortMirror function of the /goform/setPortMirror file.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11522 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11522

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11522 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11522

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.