CVE-2026-24111: Tenda w20e Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the value of `userInfo`. When `userInfo` is passed into the `addAuthUser` function and processed by `sscanf` without size validation, it could lead to buffer overflow.

Affected products

• Tenda w20e Firmware: version 15.11.0.6 only

Published 2026-03-02. Last modified 2026-06-17.