CVE-2026-43642

Description

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains a PHP object injection vulnerability in the billing module handler that allows unauthenticated remote attackers to supply arbitrary serialized PHP objects for deserialization by setting the act parameter to login with the from_billing_module parameter present. Attackers can pass malicious serialized data through the billing_data POST field to the unserialize() function without allowed_classes restrictions, enabling exploitation of available POP chains to achieve remote code execution as root.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: CRITICAL
CVSS score: 9.2 / 10
CVSS vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Effective score: 9.2 / 10 CRITICAL source: CNA overview
CWE(s): CWE-502
Reserved: 2026-05-01
Published: 2026-09-22 17:53 UTC
Last updated: 2026-09-22 17:53 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43642.json
Linked Threat: CVE-2026-43642 — Softaculous Virtualizor PHP Object 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: 8.1 / 10 HIGH source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 2.2 / 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-2026-84622
Assigner: VulnCheck
Published: Sep 22, 2026, 5:53:04 PM
Updated: Sep 22, 2026, 5:53:04 PM
EUVD base score (CVSS 4.0): 9.2 / 10
CVSS:4.0/AV:N/AC:H/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-gjf4-862p-rg96

ENISA description: Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains a PHP object injection vulnerability in the billing module handler that allows unauthenticated remote attackers to supply arbitrary serialized PHP objects for deserialization by setting the act parameter to login with the from_billing_module parameter present. Attackers can pass malicious serialized data through the billing_data POST field to the unserialize() function without allowed_classes restrictions, enabling exploitation of available POP chains to achieve remote code execution as root.

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-php-object-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-php-object-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 Advisory - Action Required - Active Exploitation of CVE-2026 ...

web:blog.checkpoint.com

CVE - 2026 -93616 is a newly discovered zero-day vulnerability in Security Management, and a fix is available now as part of this advisory. Fixes are available for both vulnerabilities. Customers running affected versions should install the applicable fixes immediately. Affected versions and remediation instructions are detailed below.

2026-09-23 15:18 UTC
CVE-2026-43642 - Exploits & Severity - Feedly

web:feedly.com

Threat intelligence report The vulnerability involves unauthenticated PHP object injection, allowing for native untrusted deserialization without stock gadgets, which poses a significant risk. A minimal fix has been implemented to prevent forged instantiations of PHP objects that could carry a proof-of-concept gadget. Patches are available in the latest software versions, but earlier versions ...

2026-09-23 15:18 UTC
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
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
About the security content of iOS 26.4.2 and iPadOS 26.4.2

web:support.apple.com

Notification Services Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later Impact: Notifications marked for deletion could be unexpectedly retained on the device Description: A logging issue was addressed with improved ...

2026-09-23 15:18 UTC
SAP Security Patch Day - September 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 8 th of September 2026 , SAP security patch day saw the release of 19 new security notes. There is 1 update to ...

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
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

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43642.json.

{
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        {
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          "vendor": "Softaculous",
          "versions": [
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        },
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        }
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      "source": {
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