CVE-2026-43641

Description

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: CRITICAL
CVSS score: 9.3 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Effective score: 9.3 / 10 CRITICAL source: CNA overview
CWE(s): CWE-78
Reserved: 2026-05-01
Published: 2026-09-22 17:51 UTC
Last updated: 2026-09-22 17:51 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43641.json
Linked Threat: CVE-2026-43641 — Softaculous Virtualizor OS Command Injection via Billing Module Handler

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: 2026-09-22 18:17:14 UTC
NVD last modified: 2026-09-22 20:43:58 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 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-2026-84620
Assigner: VulnCheck
Published: Sep 22, 2026, 5:51:13 PM
Updated: Sep 22, 2026, 5:51:13 PM
EUVD base score (CVSS 4.0): 9.3 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EUVD-reported EPSS: 0.0000
Vendors: softaculous
Products: Virtualizor (0 <3.2.9 (Patch 9))
Aliases: GHSA-x23m-fhhv-vj5x

ENISA description: Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
Softaculous	Virtualizor	`0` (affected), `3.0.0` (unaffected)	—

Vendor references (4)

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

VulnCheck Blog technical-descriptionexploit
3.2.9 Patch 9 Release Notes release-notespatch
3.3.0 Release Notes release-notespatch
https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler third-party-advisory

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 (4)

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://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ disclosure@vulncheck.com
https://www.virtualizor.com/blog/virtualizor-3-3-0/ disclosure@vulncheck.com
https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler disclosure@vulncheck.com
https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce disclosure@vulncheck.com

Remediations (10)

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

Security Advisories and Bulletins | Microsoft Learn

web:learn.microsoft.com

Learning path Learn how Microsoft supports secure software development as part of a cybersecurity solution - Training Secure software development means integrating security into each phase of your development lifecycle, from requirements analysis to maintenance. Microsoft provides many services that can help you develop more secure code and deploy a more secure application in the cloud. This ...

2026-09-23 15:18 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-23 15:18 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-23 15:18 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-23 15:18 UTC
SAP Security Patch Day - May 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 12 th of May 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-23 15:18 UTC
Microsoft Patch Tuesday Fixes Notepad Markdown RCE CVE-2026-20841

web:windowsforum.com

Microsoft published the advisory and shipped a fix through Patch Tuesday — that's the canonical remediation channel for Windows customers and enterprises. The availability of a vendor fix , with tracking via CVE and aggregator records, lets defenders plan and execute updates.

2026-09-23 15:18 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-23 15:18 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.

2026-09-23 15:18 UTC
CVE-2026-43641: Softaculous Virtualizor: Softaculous ... - Rapid7

web:www.rapid7.com

CVE-2026-43641 : Softaculous Virtualizor: Softaculous Virtualizor before 3.2.9 ( Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing…. View severity, references, and remediation details from Rapid7.

2026-09-23 15:18 UTC
Patch Tuesday September 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-09-23 15:18 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43641.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Virtualizor",
          "vendor": "Softaculous",
          "versions": [
            {
              "lessThan": "3.2.9 (Patch 9)",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Valentin Lobstein (Chocapikk)"
        },
        {
          "lang": "en",
          "type": "coordinator",
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        }
      ],
      "datePublic": "2026-09-01T00:00:00.000Z",
      "descriptions": [
        {
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          "value": "Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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          "scenarios": [
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            }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-22T17:51:13.064Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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          "tags": [
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          "url": "https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce"
        },
        {
          "name": "3.2.9 Patch 9 Release Notes",
          "tags": [
            "release-notes",
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          ],
          "url": "https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/"
        },
        {
          "name": "3.3.0 Release Notes",
          "tags": [
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            "patch"
          ],
          "url": "https://www.virtualizor.com/blog/virtualizor-3-3-0/"
        },
        {
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Softaculous Virtualizor OS Command Injection via Billing Module Handler",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-43641",
    "datePublished": "2026-09-22T17:51:13.064Z",
    "dateReserved": "2026-05-01T18:22:45.642Z",
    "dateUpdated": "2026-09-22T17:51:13.064Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}