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: 2026-06-10
Advisory published: 2026-06-09
Advisory updated: 2026-06-10

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].

Official resources

CVE-2026-36777 was published on 2026-06-09T19:17:43.970Z and modified on 2026-06-10T18:16:44.800Z.