# CVE-2026-120228: WAVLINK WN553X1-B ioos Service sub_416D88 os command injection

Status: published. Published: 2026-11-01. Updated: 2026-11-02.

A flaw has been found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_416D88 of the file /bin/ioos of the component ioos Service. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- WAVLINK / WN553X1-B: V260403_2.0.0 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P; source: CNA: VulDB

- CVSS 3.1: 9.9 (critical); 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; source: CNA: VulDB

- CVSS 3.0: 9.9 (critical); CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R; source: CNA: VulDB

- CVSS 2.0: 9 (critical); AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR; source: CNA: VulDB

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 9.9 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: NVD: cna@vuldb.com

- CVSS 2.0: 9 (high); AV:N/AC:L/Au:S/C:C/I:C/A:C; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: 1.65% as of 2026-11-02; percentile 76.54%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-78, CWE-77

## Exploit evidence

- exploit: https://github.com/senxitoyshuyi-ui/IOT-CVE/blob/main/vulns/WAVLINK%20WN553X1-B%20Router.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/429587 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/429587/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-120228 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/919151 (CNA: VulDB; third-party-advisory)

- https://github.com/senxitoyshuyi-ui/IOT-CVE/blob/main/vulns/WAVLINK%20WN553X1-B%20Router.md (CNA: VulDB; exploit)

- https://github.com/senxitoyshuyi-ui/IOT-CVE/blob/main/vulns/WAVLINK%20WN553X1-B%20Router.md (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-120228 (cna@vuldb.com)

- https://vuldb.com/submit/919151 (cna@vuldb.com)

- https://vuldb.com/vuln/429587 (cna@vuldb.com)

- https://vuldb.com/vuln/429587/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-120228; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120228; retrieved 2026-11-02; source updated 2026-11-01

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120228; retrieved 2026-11-02; source updated Not reported

Revision: 54fecac7e596800f1da6ec6952e0c8ccd5a7aa6ce597841a4134f00d669a35f0

Canonical: https://y2.dev/cve/CVE-2026-120228

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