PatchSiren cyber security CVE debrief

CVE-2026-36809 Shenzhen Tenda Technology Co., Ltd CVE debrief

A buffer overflow vulnerability was discovered in Shenzhen Tenda Technology Co., Ltd Tenda W15E v15.11.0.10. The vulnerability is located in the webAuthWhiteID parameter of the formModifyWebAuthWhiteUser function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The vulnerability has a CVSS score of 7.5 and a severity of HIGH.

Vendor: Shenzhen Tenda Technology Co., Ltd
Product: Tenda W15E
CVSS: HIGH 7.5
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

Administrators and users of Tenda W15E v15.11.0.10 should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a buffer overflow in the webAuthWhiteID parameter of the formModifyWebAuthWhiteUser function. This allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Defensive priority

HIGH

Recommended defensive actions

Update to the latest version of Tenda W15E if available.
Limit access to the affected system.
Monitor network traffic for suspicious activity.

Evidence notes

The vulnerability was discovered and reported by an unknown source. The CVE record was published on 2026-06-09T19:17:46.650Z and modified on 2026-06-10T20:17:08.157Z.

Official resources

CVE-2026-36809 was published on 2026-06-09T19:17:46.650Z and modified on 2026-06-10T20:17:08.157Z.