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Windows Server 2022 CVE-2026-24293

HIGH
NULL Pointer Dereference (CWE-476)
2026-03-10 secure@microsoft.com
Null Pointer Dereference Microsoft Denial Of Service Windows Server 2022 Windows 11 24h2 Windows Server 2025 Windows 11 23h2 Windows Server 2022 23h2 Windows 10 22h2 Windows 11 26h1 Windows 10 21h2 Windows 11 25h2 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

Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

AnalysisAI

Privilege escalation in Windows Ancillary Function Driver for WinSock affects Windows 11 24H2, Windows Server 2022, and Windows Server 2025, allowing authenticated local attackers to gain system-level access through null pointer dereference. The vulnerability requires valid user credentials and local access but no user interaction to exploit. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Local login to Windows system
Exploit
Call vulnerable WinSock AUX function
Execution
Trigger null pointer dereference
Impact
Escalate privileges to SYSTEM
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Vulnerability AssessmentAI

Exploitation Requires local user account access on Windows system with WinSock Ancillary Function Driver enabled. … 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 running the affected WinSock driver and restrict local administrative account access to trusted personnel only. …

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CVE-2026-24293 vulnerability details – vuln.today
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