# CVE-2026-69991: Microsoft Remote Desktop Client use-after-free code execution

Source: https://junglewise.ai/threats/cve-2026-69991-use-after-free-in-remote-desktop-client-allows-an-unauthorized  
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-2026-69991 · Severity: high · CVSS 7.5 · Published 2026-10-13

Microsoft Remote Desktop Client, used to connect to Windows systems remotely, contains a use-after-free vulnerability that allows an attacker to execute arbitrary code over the network without authentication. An attacker could exploit this to gain full control of a user's system or the remote Windows machine they are connected to.

Technologies: [Microsoft Remote Desktop Client](https://junglewise.ai/threats/technologies/remote-desktop-client). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69991 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69991 being exploited in the wild.

**How severe is CVE-2026-69991?** High severity, with a CVSS score of 7.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Remote Desktop Client.

**Is there a fix for CVE-2026-69991?** 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-2026-69991 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69991?** Check whether you run Microsoft Remote Desktop Client. 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 vulnerability in Remote Desktop Client allows remote code execution via network access without requiring prior authentication. The vulnerability permits an unauthenticated attacker to execute arbitrary code with the privileges of the user running the client, potentially leading to system compromise.

## Affected products

- Microsoft Remote Desktop Client

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69991](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69991)

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