WAVLINK WN551X3-A DNS Resolution ioos sub_41a430 os command injection

Summary

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.

Remediation

1. Inventory every WAVLINK WN551X3-A deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

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