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CVE-2026-34337

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

HIGH
7
CVSS Score
Published: May 12, 2026 at 04:59 PM UTC
Updated: August 10, 2026 at 03:39 PM UTC
12 products affected across 1 vendorWindows Server 2019Windows 10 1809Windows Server 2022

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Severity
HIGH7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10 1809· Microsoft
95%
v < 10.0.17763.875510.0.17763.0 ≤ v < 10.0.17763.875510.0.17763.0
Affected range stops below 10.0.17763.8755, so it looks safe — our inference, not a vendor statement
Windows 10 21H2· Microsoft
95%
v < 10.0.19044.729110.0.19044.0 ≤ v < 10.0.19044.729110.0.19044.0
Affected range stops below 10.0.19044.7291, so it looks safe — our inference, not a vendor statement
Windows 10 22H2· Microsoft
95%
v < 10.0.19045.729110.0.19045.0 ≤ v < 10.0.19045.741710.0.19045.0
Affected range stops below 10.0.19045.7417, so it looks safe — our inference, not a vendor statement
Windows 11 23H2· Microsoft
95%
v < 10.0.22631.707910.0.22631.0 ≤ v < 10.0.22631.707910.0.22631.0 ≤ v < 10.0.22631.721910.0.22631.0
Affected range stops below 10.0.22631.7079, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.22631.7219, so it looks safe — our inference, not a vendor statement
Windows 11 24H2· Microsoft
95%
v < 10.0.26100.839010.0.26100.0 ≤ v < 10.0.26100.845710.0.26100.0
Affected range stops below 10.0.26100.8457, so it looks safe — our inference, not a vendor statement
Windows 11 25H2· Microsoft
95%
v < 10.0.26200.839010.0.26200.0 ≤ v < 10.0.26200.845710.0.26200.0
Affected range stops below 10.0.26200.8457, so it looks safe — our inference, not a vendor statement
Windows 11 26H1· Microsoft
95%
v < 10.0.28000.211310.0.28000.0 ≤ v < 10.0.28000.211310.0.28000.0
Affected range stops below 10.0.28000.2113, so it looks safe — our inference, not a vendor statement
Windows Server 2019· Microsoft
95%
v < 10.0.17763.875510.0.17763.0 ≤ v < 10.0.17763.875510.0.17763.0
Affected range stops below 10.0.17763.8755, so it looks safe — our inference, not a vendor statement
Windows Server 2022· Microsoft
95%
v < 10.0.20348.507410.0.20348.0 ≤ v < 10.0.20348.513910.0.20348.0
Affected range stops below 10.0.20348.5139, so it looks safe — our inference, not a vendor statement
Windows Server 2022 23H2· Microsoft
95%
v < 10.0.25398.233010.0.25398.0 ≤ v < 10.0.25398.233010.0.25398.0
Affected range stops below 10.0.25398.2330, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34337

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGH[email protected]
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362CWE-416

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