Vulnerability · Published Nov 2, 2026 · Assigned by VulDB

CVE-2026-120344WAVLINK WN551X3-A WireGuard CLI Group ioos system os command injection

Critical 10.0

In plain English

A critical-severity OS command injection in WN551X3-A from WAVLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)2.0%top 19.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in WAVLINK WN551X3-A M51X3_V251020-WO-182e965. This affects the function system of the file /bin/ioos of the component WireGuard CLI Group Handler. Such manipulation of the argument group_name leads to os command injection. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.

Affected products (as reported)

Vendor	Product	Versions
WAVLINK	WN551X3-A	M51X3_V251020-WO-182e965

Weakness: CWE-78, CWE-77 · Vector: 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

References

VDB-429669 | WAVLINK WN551X3-A WireGuard CLI Group ioos system os command injection vdb-entry, technical-description
VDB-429669 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-120344 | CVE Analysis and Report third-party-advisory
Submit #919551 | Wavlink Router Firmware V251020-WO Command Injection third-party-advisory
https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN551X3-A%20Router/WAVLINK_WN551X3-A_wireguard_cli_group_command_injection.md exploit