CVE-2026-41926

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.

CVSS

No CVSS.

References

Link	Resource
https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.html
https://www.made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China
https://www.vulncheck.com/advisories/wdr201a-wifi-extender-os-command-injection-via-firewall-cgi

Configurations

No configuration.

History

26 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) WDR201A Extensor WiFi (HW V2.1, FW LFMZX28040922V1.02) contiene una vulnerabilidad de inyección de comandos del sistema operativo en el binario firewall.cgi a través de cinco manejadores de solicitudes que aplican validación de entrada insuficiente. Los atacantes pueden inyectar comandos de shell arbitrarios a través de parámetros vulnerables como websURLFilter, websHostFilter, portForward, singlePortForward e ipportFilter utilizando sintaxis de subshell o parámetros sin filtrar, con cargas útiles que persisten en la NVRAM y se reejecutan en cada solicitud posterior de firewall.cgi.

Information

Published : 2026-05-04 20:16

Updated : 2026-10-26 19:10

NVD link : CVE-2026-41926

Mitre link : CVE-2026-41926

CVE.ORG link : CVE-2026-41926

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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