CVE-2026-41923 CRITICAL

CVE-2026-41923: WDR201A WiFi Extender OS Command Injection via internet.cgi

Vendor Shenzhen Yipu Commercial And Trading Co., Ltd
Product WDR201A WiFi Extender
Weakness CWE-78
Published May 4, 2026
Last update May 11, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the internet.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the gateway POST parameter. Attackers can exploit unsanitized parameter concatenation in the set_add_routing function to inject shell commands that are executed via popen() with partial output reflected in the HTTP response.

Key dates

02Disclosure timeline

May 4, 2026 CVE published
May 11, 2026 Record updated