PatchSiren cyber security CVE debrief

CVE-2026-36771 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 wl_radio parameter of the formwrlSSIDset function. This issue allows attackers to cause a Denial of Service (DoS) via crafted input. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

Vendor: Shenzhen Tenda Technology Co., Ltd
Product: Tenda W3 Wireless Router v1.0.0.3(2204)
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

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 wl_radio parameter of the formwrlSSIDset function. This can be exploited by attackers to cause a Denial of Service (DoS).

Defensive priority

HIGH

Recommended defensive actions

Apply patches or updates provided by the vendor to fix the vulnerability.
Limit access to the affected system to trusted users only.
Monitor the system for suspicious activity.

Evidence notes

The vulnerability was discovered in the wild and reported to CVE.org.

Official resources

Public