# CVE-2026-119892: Microsoft Windows Installer privilege escalation via incorrect authorization

Source: https://junglewise.ai/threats/cve-2026-119892-incorrect-authorization-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-2026-119892 · Severity: high · CVSS 7.8 · Published 2026-11-10

Windows Installer, a core Windows component that manages software installation and removal, contains an authorization flaw that allows an attacker with local user access to escalate their privileges to administrator level. This could enable unauthorized modification of system files, installation of malware, or 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-2026-119892 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119892 being exploited in the wild.

**How severe is CVE-2026-119892?** 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-2026-119892?** 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-2026-119892 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-119892?** 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 incorrect authorization check in Windows Installer permits a local authenticated attacker to escalate privileges via a local attack vector. The vulnerability allows bypass of privilege boundaries during installation operations, enabling the attacker to execute arbitrary actions with system-level permissions.

## Affected products

- Microsoft Windows Installer

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119892](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119892)

## 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)