CVE-2026-96046: Windows Installer use-after-free privilege elevation

CVE-2026-96046 · Severity: high · CVSS 7 · Published 2026-11-10

Windows Installer, a component that manages software installation on Windows systems, contains a use-after-free vulnerability that allows an authenticated attacker to escalate privileges on a local system. An attacker with user-level access could exploit this flaw to gain administrator-level control, potentially compromising the entire system.

Technologies: Microsoft Windows Installer. Vendors: Microsoft.

Quick answers

Is CVE-2026-96046 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-96046 being exploited in the wild.
How severe is CVE-2026-96046?
High severity, with a CVSS score of 7, published 10 November 2026.
Which products and versions are affected?
Microsoft Windows Installer.
Is there a fix for CVE-2026-96046?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-96046 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-96046?
Check whether you run Microsoft Windows Installer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free vulnerability in Windows Installer allows an authorized local attacker to execute arbitrary code with elevated privileges. The vulnerability requires prior authentication or user interaction but enables privilege escalation from user to administrator context. A fix is available from Microsoft.

Affected products

  • Microsoft Windows Installer

Timeline

  • 2026-11-10: disclosed

References

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