CVE-2026-120240Public exploitNetwork attack vector

Root command execution via unescaped group parameters

Published Nov 1, 2026 · Updated Nov 1, 2026

Command injection in Wavlink WN553X1-B 260403_2.0.0 allows remote authenticated users to execute root commands via WireGuard group requests. The sub_41A748 function in /bin/ioos inserts group_id and group_name into single-quoted UCI commands without escaping and passes the strings to system(). Exploitation requires a valid session and access to the management interface, granting control of the router rather than merely changing VPN settings.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Command injection in Wavlink WN553X1-B 260403_2.0.0 allows remote authenticated users to execute root commands via WireGuard group requests. The sub_41A748 function in /bin/ioos inserts group_id and group_name into single-quoted UCI commands without escaping and passes the strings to system(). Exploitation requires a valid session and access to the management interface, granting control of the router rather than merely changing VPN settings.

The record

CVE
CVE-2026-120240
Published
Nov 1, 2026
Updated
Nov 1, 2026
Vendor
Wavlink Technology Ltd.
Product
WN553X1-B
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Nov 1, 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?

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

  1. Affected versionversion=V260403_2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wavlink Technology Ltd. · WN553X1-Bversion=V260403_2.0.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
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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