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PatchSiren cyber security CVE debrief

CVE-2026-36823 Shenzhen Tenda Technology Co., Ltd CVE debrief

A buffer overflow vulnerability was discovered in Shenzhen Tenda Technology Co., Ltd Tenda W20E v15.11.0.6. The vulnerability is located in the webAuthUserInfo parameter of the formAddWebAuthUser function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.5, indicating a HIGH severity.

Vendor
Shenzhen Tenda Technology Co., Ltd
Product
W20E
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Administrators and users of Tenda W20E v15.11.0.6 are advised to take necessary precautions to mitigate this vulnerability.

Technical summary

The vulnerability is caused by a buffer overflow in the webAuthUserInfo parameter of the formAddWebAuthUser function. This allows attackers to send crafted HTTP requests that can cause a Denial of Service (DoS).

Defensive priority

HIGH

Recommended defensive actions

  • Update to the latest version of Tenda W20E if available.
  • Limit access to the affected system to trusted users only.
  • Monitor the system for suspicious activity.

Evidence notes

The vulnerability was discovered and reported by an unknown source. The CVE record was published on [resourceLinkAnnotations:cve-org].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36823 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36823

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

  • CVE-2026-36823 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36823

    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.