# CVE-2026-100202: Windows Message Queuing Queue Manager use-after-free code execution

Source: https://junglewise.ai/threats/cve-2026-100202-use-after-free-in-windows-message-queuing-queue-manager-allows  
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-2026-100202 · Severity: critical · CVSS 9.8 · Published 2026-10-13

Windows Message Queuing Queue Manager contains a use-after-free vulnerability that allows an attacker on the network to execute arbitrary code with critical severity. This affects systems that handle inter-process messaging and could lead to complete system compromise or malware installation.

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-2026-100202 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100202 being exploited in the wild.

**How severe is CVE-2026-100202?** Critical severity, with a CVSS score of 9.8, published 13 October 2026.

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

**Is there a fix for CVE-2026-100202?** 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-2026-100202 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-100202?** 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 use-after-free memory corruption flaw exists in the Windows Message Queuing (MSMQ) Queue Manager component, exploitable over the network without prior authentication. The vulnerability allows arbitrary code execution in the context of the Queue Manager service, enabling post-exploitation activities such as privilege escalation or lateral movement.

## Affected products

- Microsoft Windows Message Queuing

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100202](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100202)

## Related threats

- [Windows Message Queuing use after free in Queue Manager](https://junglewise.ai/threats/cve-2026-119967-use-after-free-in-windows-message-queuing-queue-manager-allows)
- [Windows Message Queuing double free](https://junglewise.ai/threats/cve-2026-119964-double-free-in-windows-message-queuing-allows-an-unauthorized)
- [Windows Message Queuing double free remote code execution](https://junglewise.ai/threats/cve-2026-119963-double-free-in-windows-message-queuing-allows-an-unauthorized)
- [Windows Message Queuing improper input validation DoS](https://junglewise.ai/threats/cve-2026-119848-improper-input-validation-in-windows-message-queuing-allows-an)
- [Windows Message Queuing privilege escalation via untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-119833-untrusted-pointer-dereference-in-windows-message-queuing-allows)