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

CVE-2026-41926

Description

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.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

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-firewall-cginvd

News mentions

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