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CVE-2026-43642

8.1 · HIGH

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…

Published Sep 22, 2026CWE-502EPSS 0.96%

Overview

CVE-2026-43642 is a high-severity vulnerability. It was published on September 22, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/Refwww.virtualizor.com/blog/virtualizor-3-3-0/Refwww.vulncheck.com/advisories/softaculous-virtualizor-php-object-injection-via-billing-module-handlerRefwww.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43642?

CVE-2026-43642 is a high-severity vulnerability. It was published on September 22, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-43642?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-43642?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43642?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43642 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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