CVE-2026-120240

CRITICAL 9.9

WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 os command injection

CVSS Score

9.9

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was determined in WAVLINK WN553X1-B V260403_2.0.0. This issue affects the function sub_41A748 of the file /bin/ioos of the component WireGuard CLI Group Handler. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

CWE	CWE-78 CWE-77
Vendor	wavlink
Product	wn553x1-b
Published	Nov 1, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

WAVLINK / WN553X1-B

V260403_2.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/429599 vuldb.com: https://vuldb.com/vuln/429599/cti vuldb.com: https://vuldb.com/cve/CVE-2026-120240 vuldb.com: https://vuldb.com/submit/919251 github.com: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_group_command_injection.md

Credits

🔍 shuyi (VulDB User) VulDB CNA Team