CVE-2026-120239

Description

A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_419DA8 of the file /bin/ioos of the component WireGuard CLI Handler. Performing a manipulation of the argument file_id results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

Overview

State: PUBLISHED
Assigner (CNA): VulDB
CVSS severity: CRITICAL
CVSS score: 9.4 / 10
CVSS vector: 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
Effective score: 9.4 / 10 CRITICAL source: CNA overview
CWE(s): CWE-78, CWE-77
Reserved: 2026-10-31
Published: 2026-11-01 18:00 UTC
Last updated: 2026-11-01 18:00 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120239.json
Linked Threat: CVE-2026-120239 — WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command injection

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-11-01 18:17:13 UTC
NVD last modified: 2026-11-01 18:17:13 UTC
NVD CVSS v3.1: 9.9 / 10 CRITICAL source: cna@vuldb.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitability subscore: 3.1 / 10
Impact subscore: 6.0 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-114881
Assigner: VulDB
Published: Nov 1, 2026, 6:00:18 PM
Updated: Nov 1, 2026, 6:00:18 PM
EUVD base score (CVSS 4.0): 9.4 / 10
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
EUVD-reported EPSS: 0.0000
Vendors: WAVLINK
Products: WN553X1-B (V260403_2.0.0)
Aliases: GHSA-9jcp-f9g9-fr7w

ENISA description: A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_419DA8 of the file /bin/ioos of the component WireGuard CLI Handler. Performing a manipulation of the argument file_id results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

EUVD references (5)

Affected products (1)

Vendor	Product	Versions	Platforms
WAVLINK	WN553X1-B	`V260403_2.0.0` (affected)	—

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

VDB-429598 | WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command injection vdb-entrytechnical-description
VDB-429598 | CTI Indicators (IOB, IOC, TTP, IOA) signaturepermissions-required
CVE-2026-120239 | CVE Analysis and Report third-party-advisory
Submit #919250 | 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_wireguard_cli_command_injection.md exploit

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_command_injection.md cna@vuldb.com
https://vuldb.com/cve/CVE-2026-120239 cna@vuldb.com
https://vuldb.com/submit/919250 cna@vuldb.com
https://vuldb.com/vuln/429598 cna@vuldb.com
https://vuldb.com/vuln/429598/cti cna@vuldb.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

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2026-11-02 11:32 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120239.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:wavlink:wn553x1-b:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "WireGuard CLI Handler"
          ],
          "product": "WN553X1-B",
          "vendor": "WAVLINK",
          "versions": [
            {
              "status": "affected",
              "version": "V260403_2.0.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "shuyi (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_419DA8 of the file /bin/ioos of the component WireGuard CLI Handler. Performing a manipulation of the argument file_id results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "vectorString": "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "vectorString": "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",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "vectorString": "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",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 9,
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "OS Command Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-77",
              "description": "Command Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-01T18:00:18.146Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-429598 | WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command injection",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/429598"
        },
        {
          "name": "VDB-429598 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/429598/cti"
        },
        {
          "name": "CVE-2026-120239 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-120239"
        },
        {
          "name": "Submit #919250 | Wavlink Router Firmware V260403_2.0.0 Command Injection",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/919250"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_command_injection.md"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-31T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-10-31T01:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-10-31T21:19:35.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command injection",
      "x_generator": [
        "VulDB PVTS v202611"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-120239",
    "datePublished": "2026-11-01T18:00:18.146Z",
    "dateReserved": "2026-10-31T20:14:21.935Z",
    "dateUpdated": "2026-11-01T18:00:18.146Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}