Yipu WDR201A WiFi Extender up to 1.02 POST Request makeRequest.cgi set_time/StartSniffer os command injection

Summaryinfo

A vulnerability has been found in Yipu WDR201A WiFi Extender up to 1.02 and classified as critical. Affected by this issue is the function set_time/StartSniffer of the file makeRequest.cgi of the component POST Request Handler. This manipulation causes os command injection. This vulnerability is handled as CVE-2026-41924. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Yipu WDR201A WiFi Extender up to 1.02 and classified as very critical. Affected by this vulnerability is the function set_time/StartSniffer of the file makeRequest.cgi of the component POST Request Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect 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 makeRequest.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the set_time or StartSniffer functions. Attackers can craft a POST request with specially crafted ampersand-delimited parameters to bypass input sanitization and execute commands with a maximum length of 31 bytes through the date command or channel parameter processing.

The weakness was released by Matteo Strada. The advisory is shared at mstreet97.github.io. This vulnerability is known as CVE-2026-41924 since 04/22/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/05/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

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-2026-27121). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Wireless LAN Software

Vendor

• Yipu

Name

• WDR201A WiFi Extender

Version

• 1.02

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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