What is the CVSS score of EUVD-2026-22612?

EUVD-2026-22612 has a CVSS 3.1 base score of 7.0 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Microsoft are affected by EUVD-2026-22612?

CVE-2026-32224 is a local privilege escalation vulnerability in Windows Server Update Service affecting Windows 11 version 26H1 that enables authenticated users with local access to gain SYSTEM-level…. A patch is available.

How to fix or mitigate EUVD-2026-22612?

Within 24 hours: Identify and inventory all Windows 11 version 26H1 systems running WSUS components. Within 7 days: Apply Microsoft patch version 10.0.28000.1836 to affected WSUS installations and validate patch deployment via Microsoft Update or WSUS administrator console. Within 30 days: Conduct post-patch verification across all WSUS servers and document remediation completion in change management systems.

Microsoft EUVD-2026-22612

| CVE-2026-32224 HIGH

Use After Free (CWE-416)

2026-04-14 microsoft

GHSA-3hp2-fjxj-6wj4

Denial Of Service Use After Free Memory Corruption Microsoft

7.0

CVSS 3.1 · NVD

Temporal: 6.1

Severity by source

NVD PRIMARY

7.0 HIGH

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CIRCL (temporal)

6.1 MEDIUM

cvss

Primary rating from NVD.

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

Re-analysis Queued

Apr 17, 2026 - 15:22 vuln.today

cvss_changed

Analysis Generated

Apr 14, 2026 - 19:23 vuln.today

EUVD ID Assigned

Apr 14, 2026 - 17:46 euvd

EUVD-2026-22612

Analysis Generated

Apr 14, 2026 - 17:46 vuln.today

Patch released

Apr 14, 2026 - 17:46 nvd

Patch available

CVE Published

Apr 14, 2026 - 16:57 nvd

HIGH 7.0

DescriptionCVE.org

Use after free in Windows Server Update Service allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in Windows Server Update Service (WSUS) on Windows 11 version 26H1 allows low-privileged authenticated users to gain SYSTEM-level access via use-after-free memory corruption. Exploitation requires local access and high attack complexity (CVSS AC:H), indicating timing-dependent or race condition triggers. Microsoft has released patch version 10.0.28000.1836 to address this vulnerability. No public exploit code or active exploitation confirmed at time of analysis.

Technical ContextAI

This vulnerability stems from a use-after-free (CWE-416) condition in the Windows Server Update Service component. Use-after-free vulnerabilities occur when code attempts to access memory after it has been freed, potentially allowing an attacker to manipulate memory allocation to execute arbitrary code or escalate privileges. The affected product per CPE data is Windows 11 version 26H1 (microsoft:windows_11_version_26h1), specifically builds prior to 10.0.28000.1836. WSUS is a critical Windows component responsible for managing and distributing operating system updates across enterprise networks. The high attack complexity (AC:H) in the CVSS vector suggests the exploit requires precise timing or winning a race condition, making reliable exploitation more difficult than standard memory corruption issues. The local attack vector (AV:L) restricts exploitation to users with existing system access.

RemediationAI

Apply Microsoft's security update to upgrade Windows 11 version 26H1 to build 10.0.28000.1836 or later, which addresses the use-after-free vulnerability in WSUS. The patch is available through standard Windows Update channels and Microsoft Update Catalog. Organizations should prioritize patching systems where multiple users have local access or where account compromise risk is elevated. Download the update directly from Microsoft Security Response Center at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32224. No workarounds are documented in available advisories; patching is the definitive remediation. Verify patch deployment by checking system build number (winver.exe) confirms version 10.0.28000.1836 or higher. In environments where immediate patching is not feasible, implement compensating controls including enhanced monitoring of privilege escalation attempts, restricted local logon permissions, and application control policies to limit execution of unsigned binaries.