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CRITICALCVE-2026-41926Published Modified CNA VulnCheck

CVE-2026-41926: WDR201A WiFi Extender OS Command Injection via firewall.cgi

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.

Metrics

CVSS v4.0
9.3
Severity
CRITICAL
Fixed in
—
Affected Products
1
Affected packages
  • Shenzhen Yipu Commercial and Trading Co., Ltd / WDR201A WiFi Extender
    ≤ 1.02.0
CVSS Vector
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
References