# CVE-2026-120231: WAVLINK WN553X1-B OpenVPN CLI ioos sub_416568 os command injection

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

A vulnerability was determined in WAVLINK WN553X1-B V260403_2.0.0. The affected element is the function sub_416568 of the file /bin/ioos of the component OpenVPN CLI Handler. This manipulation of the argument file_id causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. 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: 1.69% as of 2026-11-02; percentile 77.03%

- 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/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_openvpn_cli_command_injection.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/429590 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/429590/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-120231 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/919247 (CNA: VulDB; third-party-advisory)

- https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_openvpn_cli_command_injection.md (CNA: VulDB; exploit)

- https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_openvpn_cli_command_injection.md (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-120231 (cna@vuldb.com)

- https://vuldb.com/submit/919247 (cna@vuldb.com)

- https://vuldb.com/vuln/429590 (cna@vuldb.com)

- https://vuldb.com/vuln/429590/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-120231; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120231; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120231; retrieved 2026-11-02; source updated Not reported

Revision: ad5f952e6052372545c1e82eb1b8c7b0f9d50b85be4b76e128cb00e07b4e431b

Canonical: https://y2.dev/cve/CVE-2026-120231

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