Vulnerability · Published Nov 1, 2026 · Assigned by VulDB

CVE-2026-120229WAVLINK WN553X1-B ioos sub_416B50 os command injection

Critical 9.1

In plain English

A critical-severity OS command injection in WN553X1-B from WAVLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 87% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)2.8%top 13.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in WAVLINK WN553X1-B 260403_2.0.0. This issue affects the function sub_416B50 of the file /bin/ioos. The manipulation of the argument file_id leads to os command injection. The attack is possible to be carried out 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:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-429588 | WAVLINK WN553X1-B ioos sub_416B50 os command injection vdb-entry, technical-description
VDB-429588 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-120229 | CVE Analysis and Report third-party-advisory
Submit #919153 | Wavlink Router Firmware V260403_2.0.0 Command Injection (Duplicate) third-party-advisory
https://github.com/senxitoyshuyi-ui/IOT-CVE/blob/main/vulns/WAVLINK_WN553X1-B_check_pwd_command_injection.md exploit