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CVE-2026-58536 Microsoft CVE debrief

CVE-2026-58536 is a high-severity vulnerability in Windows Cloud Files Mini Filter Driver that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability. This use-after-free issue can be exploited by an authorized attacker to gain elevated privileges on affected systems. System administrators should prioritize patching this vulnerability to prevent potential privilege escalation attacks.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and security teams responsible for Windows systems, particularly those using Windows 10, Windows 11, and Windows Server, should prioritize patching this vulnerability to prevent potential privilege escalation attacks. They should review system logs for potential exploitation attempts and ensure that all affected systems are updated with the latest security patches.

Technical summary

The vulnerability is a use-after-free issue in the Windows Cloud Files Mini Filter Driver. An authorized attacker can exploit this vulnerability to elevate privileges locally. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This vulnerability affects Windows 10, Windows 11, and Windows Server.

Defensive priority

High priority should be given to patching this vulnerability, as it allows for local privilege escalation. System administrators should ensure that all affected systems are updated with the latest security patches and review compensating controls for exposed systems.

Recommended defensive actions

  • Apply the patch released by Microsoft to fix the vulnerability.
  • Ensure all Windows systems are updated with the latest security patches.
  • Monitor systems for potential exploitation attempts.
  • Implement additional security measures, such as access controls and intrusion detection systems.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE record was published on 2026-07-14T18:18:40.770Z and was last modified on 2026-07-22T17:40:48.370Z. The NVD entry is currently Analyzed. This vulnerability affects Windows 10, Windows 11, and Windows Server. Microsoft has released a patch for this vulnerability. Defenders should verify patch deployment status and review system logs for potential exploitation attempts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58536 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58536

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-58536 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58536

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.