CVE-2026-41927: Shenzhen Yipu Commercial And Trading Co., Ltd WDR201A Wifi Extender

High severity, CVSS 8.3. EPSS: 0.6% chance of exploitation in the next 30 days.

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains a stack-based buffer overflow vulnerability in the firewall.cgi and makeRequest.cgi binaries that allows unauthenticated attackers to overwrite the saved return address by sending a POST request with a Content-Length header exceeding 512 bytes. Attackers can exploit insufficient length validation in the fgets() call to achieve arbitrary code execution through return-oriented programming or return-to-libc techniques.

Affected products

Published 2026-05-04. Last modified 2026-06-17.