# CVE-2026-108458: Microsoft Remote Desktop Client use-after-free remote code execution

Source: https://junglewise.ai/threats/cve-2026-108458-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-2026-108458 · Severity: high · CVSS 8.8 · Published 2026-10-13

Microsoft Remote Desktop Client, which enables users to connect to remote computers and applications, contains a use-after-free vulnerability that allows an attacker to execute arbitrary code on a user's computer over the network. An attacker can exploit this flaw by sending specially crafted network packets to a victim running the Remote Desktop Client, potentially gaining full control of the affected system without requiring user authentication.

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-2026-108458 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108458 being exploited in the wild.

**How severe is CVE-2026-108458?** High severity, with a CVSS score of 8.8, published 13 October 2026.

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

**Is there a fix for CVE-2026-108458?** 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-2026-108458 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-108458?** 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 exists in Microsoft Remote Desktop Client's network packet handling, allowing remote code execution over the network without authentication. The vulnerability is triggered through specially crafted network traffic, and exploitation results in arbitrary code execution with the privileges of the user running the Remote Desktop Client.

## Affected products

- Microsoft Remote Desktop Client

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108458](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108458)

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