# CVE-2026-119838: Windows Installer out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-119838-out-of-bounds-read-in-windows-installer-allows-an-authorized  
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-2026-119838 · Severity: medium · CVSS 4.7 · Published 2026-11-10

Windows Installer contains a flaw that allows an authorized local user to read memory outside the intended bounds, potentially exposing sensitive information stored on the system. While access requires prior authentication and local execution, the disclosure of system data could compromise credentials or other confidential information.

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

## Quick answers

**Is CVE-2026-119838 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119838 being exploited in the wild.

**How severe is CVE-2026-119838?** Medium severity, with a CVSS score of 4.7, published 10 November 2026.

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

**Is there a fix for CVE-2026-119838?** 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-2026-119838 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-119838?** 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 out-of-bounds read vulnerability in Windows Installer permits an authenticated local attacker to access memory regions beyond the buffer's allocated bounds, leading to information disclosure. The attack requires local system access and appropriate privileges; exploitation could leak sensitive data such as credentials or configuration details stored in memory.

## Affected products

- Microsoft Windows Installer

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119838](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119838)

## 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)