Description
Out-of-bounds read in Windows Cloud Files Mini Filter Driver allows an authorized attacker to disclose information locally.
Published: 2026-07-14
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The flaw is an out‐of‐bounds read in the Windows Cloud Files Mini Filter Driver. When a locally authenticated user can exercise the vulnerability, the driver reads memory beyond the intended boundary, allowing the local attacker to view data that should remain protected. The primary impact is the disclosure of information on the affected machine and the vulnerability is categorized as CWE‑125.

Affected Systems

Affected systems include Windows 10 versions 1809, 21H2, and 22H2; Windows 11 versions 24H2, 25H2, and 26H1; and Windows Server 2019 (including Server Core), Windows Server 2022, and Windows Server 2025 (including Server Core).

Risk and Exploitability

The CVSS score of 5.5 characterizes this vulnerability as moderate in severity. The EPSS score of less than 1% indicates a very low likelihood of active exploitation at present. Since the bug requires local, authenticated access and offers no remote code execution or privilege escalation, the risk is limited to the local system’s data exposure. The vulnerability is not listed in CISA’s KEV catalog.

Generated by OpenCVE AI on July 31, 2026 at 08:07 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the Microsoft Security Update that addresses CVE‑2026‑50401 via the Microsoft Security Update Guide.
  • Restrict the use of the Cloud Files Mini Filter Driver to accounts with the highest trust level and enforce least privilege constraints for those accounts.
  • If the update is not yet available, disable or remove the Mini Filter Driver from the system to prevent the out‐of‐bounds read from occurring.

Generated by OpenCVE AI on July 31, 2026 at 08:07 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 15 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
Description Out-of-bounds read in Windows Cloud Files Mini Filter Driver allows an authorized attacker to disclose information locally.
Title Windows Cloud Files Mini Filter Driver Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-125
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Subscriptions

Microsoft Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2019 Windows Server 2022 Windows Server 2025
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-30T20:24:37.315Z

Reserved: 2026-06-04T18:56:53.258Z

Link: CVE-2026-50401

cve-icon Vulnrichment

Updated: 2026-07-15T13:05:20.554Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T08:15:04Z

Weaknesses