PatchSiren cyber security CVE debrief

CVE-2026-36818 Shenzhen Tenda Technology Co., Ltd CVE debrief

A buffer overflow vulnerability was discovered in Shenzhen Tenda Technology Co., Ltd Tenda W20E v15.11.0.6. The vulnerability is located in the wewifiWhiteUserInfo parameter of the formAddWewifiWhiteUser function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.5, indicating a HIGH severity.

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

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 wewifiWhiteUserInfo parameter of the formAddWewifiWhiteUser 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 W20E if available.
Limit access to the affected system to trusted users only.
Monitor the system for suspicious activity.

Evidence notes

The vulnerability was discovered in Tenda W20E v15.11.0.6.

Official resources

CVE-2026-36818 was published on [2026-06-09T19:17:47.480Z].