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    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.

    Published:May 4, 2026
    Last Modified:May 6, 2026
    EPS:May 4, 2026
    EPSS Score:0.00438
    CVSS Score:9.3

    Affected Products

    Vendor
    Shenzhen Yuner Yipu
    Product
    Wifi Extender Wdr201a

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-41927 (CVSS 8.3) — WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains a stack-based buffer overflow vulnerability in…
    CVE-2026-41925 (CVSS 9.3) — WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the a…
    CVE-2026-41924 (CVSS 9.3) — WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the m…
    CVE-2026-41923 (CVSS 9.3) — WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the i…
    CVE-2026-41922 (CVSS 9.3) — WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the w…
    CVE-2026-30704 (CVSS 9.1) — The WiFi Extender WDR201A (HW V2.1, FW LFMZX28040922V1.02) exposes an unprotected UART interface through acces…
    CVE-2026-30701 (CVSS 9.1) — The web interface of the WiFi Extender WDR201A (HW V2.1, FW LFMZX28040922V1.02) contains hardcoded credential …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High