CVE-2026-120345: A vulnerability was found in WAVLINK WN551X3-A M51X3_V251020-WO-182e965

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CRITICAL 10.0REMOTE

CVE-2026-120345 is a critical-severity flaw (CVSS 10.0) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-11-02
Last modified	2026-11-02

Publisher (CNA): VulDB

Last updated 2026-11-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-11-02 06:17 UTCPublished CVE record published
2026-11-02 06:17 UTCUpdated Record last modified

Advisories and coverage

Research and news

Vulners Bulletins: CVE-2026-120345 2026-11-02
Vulners Bulletins: CVE-2026-120345 WAVLINK WN551X3-A DNS Resolution ioos sub_41a430 os command injection 2026-11-02
Vulners Bulletins: CVE-2026-120345 WAVLINK WN551X3-A DNS Resolution ioos sub_41a430 os command injection 2026-11-02
VulDB Recent Entries: CVE-2026-120345 | WAVLINK WN551X3-A M51X3_V251020-WO-182e965 DNS Resolution /bin/ioos sub_41a430 data os command injection 2026-11-01

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-120345?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-120345 being exploited?

CVE-2026-120345 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-120345 affect?

CVE-2026-120345 affects affected software. Severity is critical (CVSS 10.0). 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 comman

How urgent is CVE-2026-120345?

Priority 40/100. Critical severity; Remotely exploitable, no login, no user action

References

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