How to fix CVE-2026-27915?

Within 24 hours: Inventory all Windows Server 2012-2019, Windows 10, and Windows 11 systems in your environment and confirm patch availability status through your endpoint management tool. Within 7 days: Deploy vendor-released patches to all affected systems, prioritizing domain controllers, privileged access workstations, and servers hosting sensitive services. Implement staged rollout by OS version (Windows 11 26H1, then Windows 10, then Server 2019/2016/2012 R2). Within 30 days: Verify 100% patch compliance through vulnerability scanning and update your privileged access management controls to restrict local administrator privileges on standard user workstations where operationally feasible.

CVE-2026-27915

Q: Is Use After Free affected by CVE-2026-27915?

A local privilege escalation vulnerability in Windows Universal Plug and Play (UPnP) Device Host affects all supported Windows versions from Server 2012 through Windows 11 26H1, allowing authenticated users with low privileges to gain full system-level access.

EUVD-2026-22459 HIGH

2026-04-14 microsoft

GHSA-rhgr-5jwv-9hcr

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

7.8

CVSS 3.1

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

Analysis Generated

Apr 14, 2026 - 19:15 vuln.today

DescriptionNVD

Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation via use-after-free memory corruption in Windows Universal Plug and Play (UPnP) Device Host affects all supported Windows versions from Server 2012 through Windows 11 26H1. Authenticated local attackers with low privileges can exploit this CWE-416 flaw to gain SYSTEM-level access with low attack complexity (CVSS:3.1 AV:L/AC:L/PR:L). …

RemediationAI

Within 24 hours: Inventory all Windows Server 2012-2019, Windows 10, and Windows 11 systems in your environment and confirm patch availability status through your endpoint management tool. Within 7 days: Deploy vendor-released patches to all affected systems, prioritizing domain controllers, privileged access workstations, and servers hosting sensitive services. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-27915 vulnerability details – vuln.today

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CVE-2026-27915

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Full analysis requires sign-in

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External POC / Exploit Code