# CVE-2026-68887: Microsoft Windows Message Queuing out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-68887-microsoft-windows-message-queuing-out-of-bounds-read  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-68887 · Severity: high · CVSS 7.5 · Published 2026-09-08

Windows Message Queuing is a service that enables distributed messaging across corporate networks. An out-of-bounds read vulnerability allows a remote attacker to cause the Message Queuing service to crash, disrupting messaging operations and potentially affecting dependent business processes without requiring authentication.

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-2026-68887 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-68887 being exploited in the wild.

**How severe is CVE-2026-68887?** High severity, with a CVSS score of 7.5, published 8 September 2026.

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

**Is there a fix for CVE-2026-68887?** 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-2026-68887 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-68887?** Check whether you run Microsoft Windows Message Queuing at an affected version. 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

This vulnerability is an out-of-bounds read in the Windows Message Queuing Queue Manager component. The vulnerability can be triggered over the network by an unauthenticated attacker, leading to a denial of service condition where the service crashes or becomes unresponsive. The out-of-bounds read occurs when the Queue Manager processes specially crafted network requests, allowing an attacker to access memory beyond the intended buffer boundaries. This results in service termination without requiring any authentication or user interaction.

## Affected products

- Microsoft Windows Message Queuing <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68887](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68887)

## Related threats

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- [Windows Message Queuing double free remote code execution](https://junglewise.ai/threats/cve-2026-119963-double-free-in-windows-message-queuing-allows-an-unauthorized)
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- [Windows Message Queuing privilege escalation via untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-119833-untrusted-pointer-dereference-in-windows-message-queuing-allows)