# CVE-2026-119865: Windows Installer race condition privilege escalation

Source: https://junglewise.ai/threats/cve-2026-119865-concurrent-execution-using-shared-resource-with-improper  
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-2026-119865 · Severity: high · CVSS 7 · Published 2026-11-10

Windows Installer, which manages software installation and updates on Windows systems, contains a race condition vulnerability that allows an authorized attacker to escalate their privileges. An attacker with legitimate system access could exploit this flaw to gain elevated administrative rights, potentially leading to complete system compromise.

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

## Quick answers

**Is CVE-2026-119865 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119865 being exploited in the wild.

**How severe is CVE-2026-119865?** 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-2026-119865?** 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-2026-119865 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-119865?** 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 race condition exists in Windows Installer's shared resource handling due to improper synchronization, allowing an authenticated local attacker to escalate privileges. The vulnerability requires the attacker to already have authorization to access the system, and exploitation involves a timing-based attack during the installation process. A successful exploit grants elevated privileges on the affected machine.

## Affected products

- Microsoft Windows Installer

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119865](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119865)

## 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)