CVE-2026-30703Public exploitNetwork attack vector

Unauthenticated command execution via sysCMD shell invocation

Published Mar 18, 2026 · Updated Mar 18, 2026

OS command injection in Shenzhen Yuner Yipu WDR201A firmware LFMZX28040922V1.02 allows remote attackers to execute commands through adm.cgi. The set_sys_cmd handler reads the command parameter with web_get and passes it directly to sh without neutralizing shell syntax. No privileges or user interaction are required; a reachable management interface exposes command execution with the web service's operating-system authority.

CVSS severity9.8
Critical
EPSS probability1.05%
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 Shenzhen Yuner Yipu WDR201A firmware LFMZX28040922V1.02 allows remote attackers to execute commands through adm.cgi. The set_sys_cmd handler reads the command parameter with web_get and passes it directly to sh without neutralizing shell syntax. No privileges or user interaction are required; a reachable management interface exposes command execution with the web service's operating-system authority.

The record

CVE
CVE-2026-30703
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059.004Unix 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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