CVE-2026-58613: Microsoft Windows Cloud Files Mini Filter Driver privilege escalation

CVE-2026-58613 · Severity: high · CVSS 7.8 · Published 2026-07-14

A security vulnerability exists in a Windows component responsible for managing cloud-based files. If exploited, a person who already has basic access to a computer could gain full administrative control over the system. This could allow them to view sensitive data, disable security software, or disrupt business operations.

Technologies: Microsoft Windows 11, Microsoft Windows 10, Microsoft Windows Server 2019, Microsoft Windows Server 2022. Vendors: Microsoft.

Quick answers

Is CVE-2026-58613 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-58613 being exploited in the wild.
How severe is CVE-2026-58613?
High severity, with a CVSS score of 7.8, 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 10.0.17763.0 to 10.0.17763.9020; Microsoft Windows Server 2019 10.0.17763.0 to 10.0.17763.9020; Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386.
Is there a fix for CVE-2026-58613?
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-2026-58613 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-58613?
Check whether you run Microsoft Windows 11, Microsoft Windows 10, Microsoft Windows Server 2019 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

A use-after-free vulnerability (CWE-416) exists in the Windows Cloud Files Mini Filter Driver (cldflt.sys). The flaw is triggered when the driver improperly handles objects in memory, allowing a locally authenticated attacker with low privileges to execute code with SYSTEM-level permissions. The attack vector is local, requiring no user interaction. Microsoft has released security updates to address this issue across multiple versions of Windows 10, Windows 11, and Windows Server.

Affected products

  • Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
  • 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 Server 2019 10.0.17763.0 to 10.0.17763.9020
  • Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386

Timeline

  • 2026-07-14: advisory: Initial disclosure by Microsoft and NVD.

References

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