CVE-2026-41926

WDR201A WiFi Extender OS Command Injection via firewall.cgi

CVSS 9.3 CRITICALEPSS 1.2%CWE-78

Vexday Risk Score

48Atención

Decisión SSVC (CISA)

Attend

PoC disponible → seguir de cerca

CVSS 9.3EPSS 1.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Ciclo de vida

04 may 2026Publicada en NVD

Recomendación: Planificar corrección próxima — ya existe PoC pública.

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

Productos afectados

Shenzhen Yipu Commercial and Trading Co., Ltd · WDR201A WiFi Extender

PoCs públicas encontradas — 1

cve_referencemstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.htmlno verificado

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Referencias

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