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PatchSiren cyber security CVE debrief

CVE-2026-36777 Shenzhen Tenda Technology Co., Ltd CVE debrief

A stack overflow vulnerability was discovered in the Tenda W3 Wireless Router v1.0.0.3(2204) in the param_1 parameter of the formSetCfm function. This issue allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM.

Vendor
Shenzhen Tenda Technology Co., Ltd
Product
Tenda W3 Wireless Router
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-07-20
Advisory published
2026-06-09
Advisory updated
2026-07-20

Who should care

Users of Shenzhen Tenda Technology Co., Ltd Tenda W3 Wireless Router v1.0.0.3(2204) should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by a stack overflow in the param_1 parameter of the formSetCfm function. This can be exploited by sending a crafted HTTP request to the affected device, potentially leading to a Denial of Service (DoS).

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches or updates provided by the vendor, if available.
  • Restrict access to the affected device and limit the attack surface.
  • Monitor network traffic and system logs for suspicious activity.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found at [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36777 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36777

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

  • CVE-2026-36777 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36777

    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.