PatchSiren cyber security CVE debrief

CVE-2026-36822 Shenzhen Tenda Technology Co., Ltd CVE debrief

A buffer overflow vulnerability was discovered in the macAddr parameter of the formDelStaState function in Tenda W20E v15.11.0.6. This HIGH severity vulnerability, with a CVSS score of 7.5, allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Vendor: Shenzhen Tenda Technology Co., Ltd
Product: Tenda 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 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by a buffer overflow in the macAddr parameter of the formDelStaState 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

HIGH

Recommended defensive actions

Apply patches or updates provided by the vendor to fix the buffer overflow vulnerability.
Restrict access to the affected device and limit the exposure to untrusted networks.
Monitor device logs and network traffic for suspicious activity.

Evidence notes

The vulnerability was discovered and reported through a source item from the NVD database.

Official resources

CVE-2026-36822 was published on 2026-06-09T19:17:47.947Z and modified on 2026-06-09T21:17:11.503Z.