# CVE-2026-96921: Windows Message Queuing Queue Manager type confusion information disclosure

Source: https://junglewise.ai/threats/cve-2026-96921-access-of-resource-using-incompatible-type-type-confusion-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-96921 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Windows Message Queuing Queue Manager, a Windows system component that manages message queues for applications, contains a type confusion vulnerability. An authorized local attacker can exploit this flaw to read sensitive information from the system that they would not normally have access to.

Technologies: [Microsoft Windows Message Queuing](https://junglewise.ai/threats/technologies/windows-message-queuing). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-96921 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96921 being exploited in the wild.

**How severe is CVE-2026-96921?** Medium severity, with a CVSS score of 5.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Message Queuing.

**Is there a fix for CVE-2026-96921?** 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-2026-96921 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-96921?** Check whether you run Microsoft Windows Message Queuing. 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 type confusion vulnerability in Windows Message Queuing Queue Manager allows an authenticated local attacker to access memory or resources with an incompatible type, leading to information disclosure. The vulnerability requires local access and authentication. No remote exploitation or user interaction is required.

## Affected products

- Microsoft Windows Message Queuing

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96921](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96921)

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