Critical 9.3Published May 4, 2026

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

Updated under an hour ago (Oct 27, 2026, 3:00 PM ET)

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It affects Shenzhen Yipu Commercial and Trading Co., Ltd WDR201A WiFi Extender. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Shenzhen Yipu Commercial and Trading Co., Ltd WDR201A WiFi Extender

Exploited in the last 30 days

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: 9.3 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Shenzhen Yipu Commercial and Trading Co., Ltd WDR201A WiFi Extender shenzhen_yipu_commercial_and_trading:wdr201a_wifi_extender (from the name)	through 1.02.0	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.