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Public vulnerability disclosure

CVE-2026-120345

WAVLINK WN551X3-A DNS Resolution ioos sub_41a430 os command injection

publishedCWE-78CWE-77

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.

Investigate in Cyber JSONMarkdown
Technical severity10.0 criticalCVSS 4.0 · CNA: VulDB
Published2026-11-02Source updated 2026-11-02
Collected2026-11-021 attributed source

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

ProductVersionsAuthority
WN551X3-A
WAVLINK 		M51X3_V251020-WO-182e965 (affected) CNA: VulDB

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

Version / scoreVectorAuthority
4.0 / 10.0
critical		 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:PCNA: VulDB
3.1 / 10.0
critical		 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:RCNA: VulDB
3.0 / 10.0
critical		 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:RCNA: VulDB
2.0 / 10.0
critical		 AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:URCNA: VulDB

Exploit evidence

References