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CVE-2026-80093

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

Published: Sep 8, 2026Updated: Sep 10, 2026 Sources: CVE List NVDCWE-416
7.0HIGH
NVD MITRE
EPSS Score
0.3%
Top 72.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

In plain language

AI Act now

CVE-2026-80093 is a Windows security flaw that can let a locally logged-in attacker gain higher privileges; most small businesses should treat it as serious and patch it if these Windows versions are in use.

Executive summary

CVE-2026-80093 is a local elevation of privilege issue caused by a use-after-free condition in the Windows Cloud Files Mini Filter Driver, where an authorized local attacker can trigger the weakness to run with higher privileges.

If affected, business impact
Local privilege escalationPotential full system compromiseAccount takeover riskOperational disruption from remediation

What to do now

  1. Check which systems run Windows 10, Windows 11, or Windows Server 2019/2022/2025 and confirm whether they are updated past the fixed build listed below.
  2. For Windows 10, update to 10.0.17763.9245 or 10.0.19044.7725 or 10.0.19045.7725.
  3. For Windows 11, update to 10.0.22631.7582 or 10.0.26100.9445 or 10.0.26200.9445 or 10.0.28000.2954.
  4. For Windows Server 2019, update to 10.0.17763.9245; for Windows Server 2022, update to 10.0.20348.5622; for Windows Server 2025, update to 10.0.26100.33438.
  5. If you can’t patch immediately, isolate affected machines from the network and limit who can log on locally, then patch as soon as possible.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

Microsoft
commercial·US
Windows 10 Version 1809On-premOS
Operating Systems / windows
Windows 11 version 23H2On-premOS
Operating Systems / windows
Windows Server 2019 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2022On-premOS
Operating Systems / windows
Windows Server 2025 (Server Core installation)On-premOS
Operating Systems / windows
and 18 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-80093?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80093
msrc.microsoft.com
https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2445
talosintelligence.com
News mentions
4

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