Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-43642

CVE-2026-43642CRITICAL

Softaculous Virtualizor PHP Object Injection via Billing Module Handler

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   N   N   H   H   H    9.2   .0096   60.2     —

AFFECTED
  Product      Versions     Fixed
  Virtualizor  unspecified  3.0.0

TIMELINE
  May 1   Reserved by VulnCheck
  Sep 22  Published (CNA: VulnCheck)
  Sep 25  EXPLOIT PUBLISHED — CVE-2026-43642 (Softaculous Virtualizor). Public exploit reference added.
  Oct 1   EXPLOIT PUBLISHED — CVE-2026-43642 (Softaculous Virtualizor). Public exploit reference added.

CWE-502 · CNA: VulnCheck · CVSS v4.0 · 4 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
May 1, 2026	Reserved	Reserved by VulnCheck
September 22, 2026	Published	Published (CNA: VulnCheck)
September 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-43642 (Softaculous Virtualizor). Public exploit reference added.
October 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-43642 (Softaculous Virtualizor). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Softaculous	Virtualizor	—	—	3.0.0

Weaknesses

CWE-502

References (4)

https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/ [release-notes, patch]
https://www.virtualizor.com/blog/virtualizor-3-3-0/ [release-notes, patch]
https://www.vulncheck.com/advisories/softaculous-virtualizor-php-object-injection-via-billing-module-handler [third-party-advisory]
https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce [technical-description, exploit]

Authoritative record: CVE-2026-43642 at cve.org

Vendors: softaculous

Weaknesses: CWE-502

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-43642 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.