CVE-2026-27922

| EUVD-2026-22469 HIGH
2026-04-14 microsoft GHSA-2qwh-pgh7-pj9g
Denial Of Service Use After Free Memory Corruption Microsoft Windows 10 Version 1607 Windows 10 Version 1809 Windows 10 Version 21H2 Windows 10 Version 22H2 Windows 11 Version 22H3 Windows 11 Version 23H2 Windows 11 Version 24H2 Windows 11 Version 25H2 Windows 11 Version 26H1 Windows Server 2012 Windows Server 2012 Server Core Installation Windows Server 2012 R2 Windows Server 2012 R2 Server Core Installation Windows Server 2016 Windows Server 2016 Server Core Installation Windows Server 2019 Windows Server 2019 Server Core Installation Windows Server 2022 Windows Server 2022 23H2 Edition Server Core Installation Windows Server 2025 Windows Server 2025 Server Core Installation
7.0
CVSS 3.1
Temporal: 6.1
Share

CVSS VectorNVD

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

Lifecycle Timeline

1
Analysis Generated
Apr 14, 2026 - 19:30 vuln.today

DescriptionNVD

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in the Windows Ancillary Function Driver for WinSock (AFD.sys) affects all Windows 10, Windows 11, and Windows Server versions from 2012 through 2025 via a use-after-free memory corruption flaw. Authenticated local attackers with low privileges can exploit this CWE-416 vulnerability to achieve full system compromise (SYSTEM-level access), though the high attack complexity (AC:H) suggests exploitation requires precise timing or race condition manipulation. …

Sign in for full analysis, threat intelligence, and remediation guidance.

RemediationAI

Within 24 hours: Inventory all Windows 10, Windows 11, and Windows Server 2012-2025 systems in your environment and prioritize servers handling sensitive workloads. Within 7 days: Obtain vendor patch details from Microsoft security bulletins and test in non-production environments; apply to critical infrastructure and servers first. …

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Share

CVE-2026-27922 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy