Vulnerability · Published Nov 1, 2026 · Assigned by VulDB

CVE-2026-120238WAVLINK WN553X1-B ovpn_file ioos sub_4162A8 os command injection

Critical 9.9

In plain English

A critical-severity OS command injection in WN553X1-B from WAVLINK. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)1.7%top 22.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in WAVLINK WN553X1-B 260403_2.0.0. This affects the function sub_4162A8 of the file /bin/ioos of the component ovpn_file Handler. Such manipulation of the argument file_id leads to os command injection. The attack can be executed remotely. 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	WN553X1-B	260403_2.0.0

Weakness: CWE-78, CWE-77 · Vector: 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

References

VDB-429597 | WAVLINK WN553X1-B ovpn_file ioos sub_4162A8 os command injection vdb-entry, technical-description
VDB-429597 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-120238 | CVE Analysis and Report third-party-advisory
Submit #919248 | Wavlink Router Firmware V260403_2.0.0 Command Injection third-party-advisory
https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_ovpn_file_command_injection.md exploit