CVE-2026-120345

CRITICAL 10.0

WAVLINK WN551X3-A DNS Resolution ioos sub_41a430 os command injection

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78 CWE-77
Vendor	wavlink
Product	wn551x3-a
Published	Nov 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

WAVLINK / WN551X3-A

M51X3_V251020-WO-182e965

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/429670 vuldb.com: https://vuldb.com/vuln/429670/cti vuldb.com: https://vuldb.com/cve/CVE-2026-120345 vuldb.com: https://vuldb.com/submit/919579 github.com: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN551X3-A%20Router/WAVLINK_WN551X3-A_dns_resolution_command_injection.md

Credits

🔍 llsss (VulDB User) VulDB CNA Team