CVE-2026-120345 Details
Description
A vulnerability was found in WAVLINK WN551X3-A M51X3_V251020-WO-182e965. This impacts the function sub_41a430 of the file /bin/ioos of the component DNS Resolution Handler. Performing a manipulation of the argument data results in os command injection. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.
An OS command injection vulnerability has been identified in the WAVLINK WN551X3-A router, specifically in the firmware version M51X3_V251020-WO-182e965. The issue resides in the DNS resolution handler of the device's web backend, which is based on OpenWrt and runs on ARM architecture. The vulnerability allows for remote exploitation by manipulating the 'data' parameter of an HTTP request, bypassing a validator that only rejects semicolons but not newlines. This flaw can be exploited to execute arbitrary commands with root privileges.
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 2, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN551X3-A%20Router/WAVLINK_WN551X3-A_dns_resolution_command_injection.md | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-120345 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/919579 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/429670 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/429670/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 WN551X3-A | M51X3_V251020-WO-182e965 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Nov 2, 2026 | New CVE Received | [email protected] |