Critical severityNVD Advisory· Published May 4, 2026· Updated May 5, 2026

CVE-2026-41923

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.

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Patches

Vulnerability mechanics

References

mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.htmlnvd
www.made-in-china.com/showroom/yeapook/nvd
www.vulncheck.com/advisories/wdr201a-wifi-extender-os-command-injection-via-internet-cginvd

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cvss	0.585
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000