CVE-2026-120240

Description

A vulnerability was determined in WAVLINK WN553X1-B V260403_2.0.0. This issue affects the function sub_41A748 of the file /bin/ioos of the component WireGuard CLI Group Handler. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. 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 18:30 UTC
Last updated: 2026-11-01 18:30 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120240.json
Linked Threat: CVE-2026-120240 — WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 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 19:16:57 UTC
NVD last modified: 2026-11-01 19:16:57 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-2026-114882
Assigner: VulDB
Published: Nov 1, 2026, 6:30:11 PM
Updated: Nov 1, 2026, 6:30:11 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-mqwg-mjc3-vq36

ENISA description: A vulnerability was determined in WAVLINK WN553X1-B V260403_2.0.0. This issue affects the function sub_41A748 of the file /bin/ioos of the component WireGuard CLI Group Handler. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. 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-429599 | WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 os command injection vdb-entrytechnical-description
VDB-429599 | CTI Indicators (IOB, IOC, TTP, IOA) signaturepermissions-required
CVE-2026-120240 | CVE Analysis and Report third-party-advisory
Submit #919251 | 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_group_command_injection.md exploit

MITRE references (5) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_group_command_injection.md exploit
CVE-2026-120240 | CVE Analysis and Report third-party-advisory
Submit #919251 | Wavlink Router Firmware V260403_2.0.0 Command Injection third-party-advisory
VDB-429599 | WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 os command injection vdb-entry, technical-description
VDB-429599 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required

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_group_command_injection.md cna@vuldb.com
https://vuldb.com/cve/CVE-2026-120240 cna@vuldb.com
https://vuldb.com/submit/919251 cna@vuldb.com
https://vuldb.com/vuln/429599 cna@vuldb.com
https://vuldb.com/vuln/429599/cti cna@vuldb.com

Remediations (10)

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

CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

web:cyberupdates365.com

Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-02 11:32 UTC
Security Advisories and Bulletins | Microsoft Learn

web:learn.microsoft.com

In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort ...

2026-11-02 11:32 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

None of these is a clean fix , which is why the decision on how to remediate depends on knowing what package versions are running in production and why. This post will cover how AI has accelerated CVE detection and discovery, the upgrade trap, what CVE remediation actually involves in 2026 , and how to solve the CVE remediation problem.

2026-11-02 11:32 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-11-02 11:32 UTC
Patch now: PHP2Shell, Brotli, and eMudhra guidance for customers

web:www.microsoft.com

If you can't patch immediately: Apply the PHP project's interim mitigations and the Azure WAF protections. Note: This reduces exposure but doesn't fix the underlying vulnerabilities.

2026-11-02 11:32 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-11-02 11:32 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-11-02 11:32 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-02 11:32 UTC
Latest CVEs & Actively Exploited Vulnerabilities | Tech Times

web:www.techtimes.com

Actively exploited vulnerabilities and the latest critical CVEs , updated hourly.

2026-11-02 11:32 UTC
The CVE Database: Curated Vulnerability Intelligence by Wiz | Wiz

web:www.wiz.io

Wiz's CVE Database curates CVE data to create easy-to-navigate profiles that cover the entire vulnerability timeline, exploit scenarios, and mitigation steps.

2026-11-02 11:32 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120240.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:wavlink:wn553x1-b:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "WireGuard CLI Group 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 determined in WAVLINK WN553X1-B V260403_2.0.0. This issue affects the function sub_41A748 of the file /bin/ioos of the component WireGuard CLI Group Handler. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. 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": {
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            "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": [
            {
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              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-77",
              "description": "Command Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-01T18:30:11.233Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-429599 | WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 os command injection",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/429599"
        },
        {
          "name": "VDB-429599 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/429599/cti"
        },
        {
          "name": "CVE-2026-120240 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-120240"
        },
        {
          "name": "Submit #919251 | Wavlink Router Firmware V260403_2.0.0 Command Injection",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/919251"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_group_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": "2026-10-31T21:19:39.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "WAVLINK WN553X1-B WireGuard CLI Group ioos sub_41A748 os command injection",
      "x_generator": [
        "VulDB PVTS v202611"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-120240",
    "datePublished": "2026-11-01T18:30:11.233Z",
    "dateReserved": "2026-10-31T20:14:25.434Z",
    "dateUpdated": "2026-11-01T18:30:11.233Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}