CVE-2026-41923
OS Command Injection in WDR201A WiFi Extender
Publication date: 2026-05-04
Last updated on: 2026-05-04
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability exists in the WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) within the internet.cgi binary. It is an OS command injection flaw that allows unauthenticated remote attackers to execute arbitrary shell commands. This is possible because the gateway POST parameter is not properly sanitized before being concatenated in the set_add_routing function. The injected commands are executed via the popen() function, and part of the output is reflected back in the HTTP response.
How can this vulnerability impact me? :
This vulnerability can have severe impacts as it allows unauthenticated remote attackers to execute arbitrary shell commands on the affected device. This could lead to full compromise of the device, unauthorized access to network resources, data theft, disruption of network services, or using the device as a foothold for further attacks within the network.