Shenzhen Yipu WDR201A WiFi Extender up to 1.02 os command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in Shenzhen Yipu WDR201A WiFi Extender up to 1.02. Impacted is an unknown function. Performing a manipulation results in os command injection. This vulnerability is reported as CVE-2026-41926. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Shenzhen Yipu WDR201A WiFi Extender up to 1.02. This affects an unknown functionality. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Matteo Strada. It is possible to read the advisory at mstreet97.github.io. This vulnerability is uniquely identified as CVE-2026-41926 since 04/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/05/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-27125). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• Shenzhen Yipu

Name

• WDR201A WiFi Extender

Version

• 1.02

CPE 2.3info

• 🔒

CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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