What is CVE-2026-34332?

CVE-2026-34332 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Kernel-Mode Driver Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-34332 cover?

CVE-2026-34332 covers the following CVE IDs: CVE-2026-34332. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-34332?

CVE-2026-34332 has a CVSS v3 base score of 8.0, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-34332?

CVE-2026-34332 affects 2 products, including: Windows Server 2025; Windows Server 2025 (Server Core installation).

CVE-2026-34332HighCVSS 8.0

Windows Kernel-Mode Driver Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-34332 →

📋 Description

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.

🎯 Affected products2

Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5087539 (Security Update) — fixed build 10.0.26100.32860 KB5087423 (Security Hotpatch Update) — fixed build 10.0.26100.32772

🔗 References (5)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34332
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5087539
referencehttps://support.microsoft.com/help/5087539
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5087423
referencehttps://support.microsoft.com/help/5087423