# CVE-2026-119887: Windows Installer information disclosure via uninitialized resource

Source: https://junglewise.ai/threats/cve-2026-119887-use-of-uninitialized-resource-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-2026-119887 · Severity: medium · CVSS 6.5 · Published 2026-11-10

Windows Installer, which handles software installation and updates on Windows systems, contains a vulnerability where uninitialized memory can be read over the network. An attacker could exploit this to retrieve sensitive information such as credentials, keys, or other confidential data stored in memory during the installation process.

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

## Quick answers

**Is CVE-2026-119887 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119887 being exploited in the wild.

**How severe is CVE-2026-119887?** Medium severity, with a CVSS score of 6.5, published 10 November 2026.

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

**Is there a fix for CVE-2026-119887?** 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-2026-119887 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-119887?** 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

The vulnerability stems from use of an uninitialized resource in Windows Installer, allowing information disclosure via network access. The attack vector is network-based, meaning an attacker does not require local access or authentication to exploit the flaw. Successful exploitation results in unauthorized disclosure of sensitive information resident in memory.

## Affected products

- Microsoft Windows Installer

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119887](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119887)

## 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)