CVE-2026-58626: Microsoft Windows Remote Desktop Services use after free

CVE-2026-58626 · Severity: high · CVSS 8.8 · Published 2026-07-14

A security vulnerability exists in Windows Remote Desktop Services, a feature that allows users to access their computers remotely over a network. An authorized user could exploit this flaw to run unauthorized code on the system, potentially leading to a full system takeover or data theft. This poses a significant risk to corporate environments that rely on remote access for employees or server management.

Technologies: Microsoft Windows 11, Microsoft Windows 10, Microsoft Windows Server 2022, Microsoft Windows Server 2025. Vendors: Microsoft.

Quick answers

Is CVE-2026-58626 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-58626 being exploited in the wild.
How severe is CVE-2026-58626?
High severity, with a CVSS score of 8.8, published 14 July 2026.
Which products and versions are affected?
Microsoft Windows 11 10.0.26100.0 to 10.0.26100.8875; Microsoft Windows 10 10.0.19044.0 to 10.0.19044.7548; Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386; Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158.
Is there a fix for CVE-2026-58626?
A patch was published on 2026-07-14: Security updates made available via Microsoft Update Guide. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-58626 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-58626?
Check whether you run Microsoft Windows 11, Microsoft Windows 10, Microsoft Windows Server 2022 or one of the others listed 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 classified as a Use After Free (CWE-416) within the Windows Remote Desktop Services component. An attacker with low-privileged credentials can exploit this flaw over the network without any user interaction. Successful exploitation allows for remote code execution (RCE) on the target system. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. Microsoft has released security updates to address this issue.

Affected products

  • Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
  • Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
  • Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
  • Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26100.8875
  • Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2525
  • Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386
  • Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158

Timeline

  • 2026-07-14: advisory: Initial advisory published by Microsoft and NVD.
  • 2026-07-14: patched: Security updates made available via Microsoft Update Guide.

References

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