Description
WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the internet.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the gateway POST parameter. Attackers can exploit unsanitized parameter concatenation in the set_add_routing function to inject shell commands that are executed via popen() with partial output reflected in the HTTP response.
Published: 2026-05-04
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 06 May 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Shenzhen Yuner Yipu
Shenzhen Yuner Yipu wifi Extender Wdr201a
Vendors & Products Shenzhen Yuner Yipu
Shenzhen Yuner Yipu wifi Extender Wdr201a

Tue, 05 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 04 May 2026 19:30:00 +0000

Type Values Removed Values Added
Description WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the internet.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the gateway POST parameter. Attackers can exploit unsanitized parameter concatenation in the set_add_routing function to inject shell commands that are executed via popen() with partial output reflected in the HTTP response.
Title WDR201A WiFi Extender OS Command Injection via internet.cgi
Weaknesses CWE-78
References
Metrics cvssV4_0

{'score': 9.3, 'vector': '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'}


Subscriptions

Shenzhen Yuner Yipu Wifi Extender Wdr201a
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-11T23:11:48.064Z

Reserved: 2026-04-22T18:50:43.619Z

Link: CVE-2026-41923

cve-icon Vulnrichment

Updated: 2026-05-05T13:09:33.227Z

cve-icon NVD

Status : Deferred

Published: 2026-05-04T20:16:19.017

Modified: 2026-05-05T19:47:31.297

Link: CVE-2026-41923

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T09:22:40Z

Weaknesses