CVE-2026-41923Public exploitNetwork attack vector

Unauthenticated command execution via unsanitized gateway parameter

Published May 4, 2026 · Updated May 4, 2026

OS command injection in internet.cgi in WDR201A WiFi Extender 1.02 and earlier allows remote attackers to execute shell commands via HTTP POST. The set_add_routing function inserts the decoded gateway parameter into an ip route add command without neutralizing shell metacharacters, then passes the result to popen(). No authentication or user interaction is required, and command output is returned in the HTTP response, enabling remote control of the appliance.

CVSS severity9.3
Critical
EPSS probability2.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in internet.cgi in WDR201A WiFi Extender 1.02 and earlier allows remote attackers to execute shell commands via HTTP POST. The set_add_routing function inserts the decoded gateway parameter into an ip route add command without neutralizing shell metacharacters, then passes the result to popen(). No authentication or user interaction is required, and command output is returned in the HTTP response, enabling remote control of the appliance.

The record

CVE
CVE-2026-41923
Published
May 4, 2026
Updated
May 4, 2026
Vendor
Shenzhen Yipu Commercial and Trading Co., Ltd
Product
WDR201A WiFi Extender
Classifications
CWE-78, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.02

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Yipu Commercial and Trading Co., Ltd · WDR201A WiFi Extenderversion=0 <=1.02

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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