CVE-2026-41923 WDR201A WiFi Extender OS Command Injection via internet.cgi
Unauthenticated remote attackers can execute arbitrary shell commands on the WDR201A WiFi Extender via the internet.cgi gateway parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41923?
CVE-2026-41923 is a critical command injection vulnerability in Shenzhen Yipu Commercial and Trading Co., Ltd WDR201A WiFi Extender, published on 4 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-41923?
How do I fix CVE-2026-41923?
No fix has been published for CVE-2026-41923 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-41923 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41923 exists.
Sources
Also known as GHSA-2frf-w2p8-6vq5.