CVE-2026-41926: Shenzhen Yipu Commercial And Trading Co., Ltd WDR201A Wifi Extender

Critical severity, CVSS 9.3. EPSS: 1.9% chance of exploitation in the next 30 days.

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the firewall.cgi binary across five request handlers that apply insufficient input validation. Attackers can inject arbitrary shell commands through vulnerable parameters like websURLFilter, websHostFilter, portForward, singlePortForward, and ipportFilter using subshell syntax or unfiltered parameters, with payloads persisting in NVRAM and re-executing on every subsequent firewall.cgi request.

Affected products

• Shenzhen Yipu Commercial And Trading Co., Ltd WDR201A Wifi Extender: up to and including 1.02.0

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