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Windows Server 2022 CVE-2026-25174

HIGH
Out-of-bounds Read (CWE-125)
2026-03-10 secure@microsoft.com
Information Disclosure Buffer Overflow Microsoft Windows Server 2022 Windows 10 1607 Windows 11 25h2 Windows 11 23h2 Windows 11 26h1 Windows Server 2025 Windows Server 2022 23h2 Windows Server 2019 Windows 10 21h2 Windows 10 1809 Windows 11 24h2 Windows Server 2012 Windows Server 2016 Windows 10 22h2 Windows
7.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 10, 2026 - 18:18 nvd
HIGH 7.8

DescriptionCVE.org

Out-of-bounds read in Windows Extensible File Allocation allows an authorized attacker to elevate privileges locally.

AnalysisAI

Windows Extensible File Allocation (exFAT) contains an out-of-bounds read vulnerability affecting Windows Server 2022, Windows 10 1607, and Windows 11 versions 23h2/25h2, enabling authenticated local users to escalate privileges with high impact on confidentiality, integrity, and availability. The vulnerability requires local access and user-level privileges to exploit, with no patch currently available. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticated user crafts malicious file
Exploit
Trigger out-of-bounds read in exFAT parser
Execution
Access elevated memory regions
Impact
Escalate local privileges to SYSTEM
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Vulnerability AssessmentAI

Exploitation Attacker must have local system access with standard user privileges. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker could exploit this vulnerability to compromise the affected system.
Remediation Monitor vendor advisories for a patch. Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all Windows systems using Extensible File Allocation Table (exFAT) and assess exposure in high-value environments. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-25174 vulnerability details – vuln.today
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