# CVE-2026-96036: Windows Installer integer overflow privilege escalation

Source: https://junglewise.ai/threats/cve-2026-96036-integer-overflow-or-wraparound-in-windows-installer-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-96036 · Severity: high · CVSS 7.8 · Published 2026-11-10

Windows Installer, the system component that manages software installation on Windows computers, contains an integer overflow vulnerability that allows an authorized local attacker to gain elevated privileges. An attacker with limited access to a Windows system could exploit this to run code with administrator-level permissions, potentially compromising the entire system.

Technologies: [Microsoft Windows Installer](https://junglewise.ai/threats/technologies/windows-installer). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-96036 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96036 being exploited in the wild.

**How severe is CVE-2026-96036?** High severity, with a CVSS score of 7.8, published 10 November 2026.

**Which products and versions are affected?** Microsoft Windows Installer.

**Is there a fix for CVE-2026-96036?** 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-2026-96036 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-96036?** 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

An integer overflow or wraparound condition in Windows Installer's privilege escalation path allows an authenticated local attacker to bypass security restrictions and execute code with elevated privileges. The vulnerability requires prior local access and authentication but does not require user interaction. Exploitation could lead to complete system compromise.

## Affected products

- Microsoft Windows Installer

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96036](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96036)

## Related threats

- [Microsoft Windows Installer stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-96152-stack-based-buffer-overflow-in-windows-installer-allows-an)
- [Windows Installer heap-based buffer overflow allows privilege elevation](https://junglewise.ai/threats/cve-2026-96085-heap-based-buffer-overflow-in-windows-installer-allows-an)
- [Microsoft Windows Installer heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96062-heap-based-buffer-overflow-in-windows-installer-allows-an)
- [Windows Installer use-after-free privilege elevation](https://junglewise.ai/threats/cve-2026-96061-use-after-free-in-windows-installer-allows-an-authorized-attacker)
- [Windows Installer out-of-bounds read privilege escalation](https://junglewise.ai/threats/cve-2026-96060-out-of-bounds-read-in-windows-installer-allows-an-authorized)