CVE-2026-120239 Details
Description
A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_419DA8 of the file /bin/ioos of the component WireGuard CLI Handler. Performing a manipulation of the argument file_id results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.
A command injection vulnerability has been identified in the WAVLINK WN553X1-B router, specifically in the WireGuard CLI Handler. This vulnerability, present in firmware version V260403_2.0.0, allows authenticated users to execute arbitrary OS commands with root privileges. The issue arises in the function sub_419DA8 of the file /bin/ioos, where the user-controlled file_id parameter is passed to snprintf without proper validation, enabling command injection via the WireGuard CLI interface.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 1, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_command_injection.md | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-120239 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/919250 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/429598 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/429598/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WAVLINK WN553X1-B | V260403_2.0.0 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Nov 1, 2026 | New CVE Received | [email protected] |