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TI-2026-83751 Aliases CVE-2026-120344GHSA-fqxg-jwfx-25cg

WAVLINK WN551X3-A WireGuard CLI Group ioos os command injection

Priority HIGH 82CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

A vulnerability in the system function of /bin/ioos in WAVLINK WN551X3-A M51X3_V251020-WO-182e965 lets a remote attacker run OS commands by manipulating the group_name argument of the WireGuard CLI Group Handler. The weakness is mapped to CWE-77 and CWE-78, and the CVSS 4.0 base score is 10.0 (CRITICAL). A public exploit has been disclosed and may be used, and CISA has not added it to KEV. The vendor was contacted early about the disclosure.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01989 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WavlinkWN551X3-AM51X3_V251020-WO-182e965—No fix listedCNA
  • WN551X3-A VendorWavlink Affected M51X3_V251020-WO-182e965 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:wavlink:wn551x3-a:*:*:*:*:*:*:*:*——Wavlink
  • cpe:2.3:a:wavlink:wn551x3-a:*:*:*:*:*:*:*:* Versions — — ·Wavlink

Remediation

No fix is listed for WAVLINK WN551X3-A M51X3_V251020-WO-182e965 at the time of publication. Limit network access to the device and watch the WireGuard group_name input until the vendor releases a fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-120344
  2. 2026-11-02 Alias added: GHSA-fqxg-jwfx-25cg
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: MEDIUM → HIGH

References

Exploit 1

  • TI-2022-02298 WAVLINK WN535K2/WN535K3 nightled.cgi os command injection CVSS 3.1CRITICAL 9.8
  • TI-2026-83752 OS command injection in WAVLINK WN551X3-A DNS resolution handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83668 Stack-based overflow in WAVLINK WN536AX6-A OpenVPN handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83667 OS command injection in WAVLINK WN536AX6-A WireGuard handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83666 OS command injection in WAVLINK WN536AX6-A openvpn_cli handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83664 WAVLINK WN536AX6-A WireGuard CLI Group ioos sub_41a1d8 OS command injection CVSS 4.0CRITICAL 10.0
See all 248 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences