What is the CVSS score of EUVD-2026-43949?

EUVD-2026-43949 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Windows Server 2012 are affected by EUVD-2026-43949?

A privilege escalation vulnerability in the Windows NTFS driver (CVE-2026-50422) enables any authenticated user to gain system-level administrative access, affecting Windows 10, Windows 11, and…. A patch is available.

How to fix or mitigate EUVD-2026-43949?

Within 24 hours, conduct a complete inventory of Windows 10 (versions 1607-22H2), Windows 11 (24H2, 25H2, 26H1), and Windows Server 2012-2025 systems to establish a patch baseline and identify critical systems. Within 7 days, deploy the vendor-released patch through Windows Update, WSUS, or equivalent patch management tools, prioritizing systems with elevated privileges or running as services. Within 30 days, achieve 100% compliance across the Windows fleet through vulnerability scanning and verification reporting.

Windows Server 2012 EUVD-2026-43949

| CVE-2026-50422 HIGH

Out-of-bounds Read (CWE-125)

2026-07-14 microsoft

GHSA-4hp9-gm7v-rq3h

Buffer Overflow Information Disclosure Microsoft Windows Server 2012 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025 Windows 10 Version 1607 Windows 10 Version 1809 Windows 10 Version 21H2 Windows 10 Version 22H2 Windows Server 2016 Server Core Installation Windows Server 2019 Server Core Installation Windows 11 Version 24H2 Windows 11 Version 25H2 Windows 11 Version 26H1 Windows Server 2025 Server Core Installation Windows Server 2012 Server Core Installation Windows Server 2012 R2 Windows Server 2012 R2 Server Core Installation

7.8

CVSS 3.1 · Vendor: microsoft

Severity by source

Vendor (microsoft) PRIMARY

7.8 HIGH

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

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 14, 2026 - 20:30 vuln.today

CVE Published

Jul 14, 2026 - 17:07 cve.org

HIGH 7.8

DescriptionCVE.org

Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in the Windows NTFS file-system driver lets an already-authenticated low-privileged user read memory outside allocated bounds (CWE-125) to gain elevated privileges. It affects a broad Windows fleet spanning Windows 10 (1607 through 22H2), Windows 11 (24H2, 25H2, 26H1), and Windows Server 2012 through 2025. Reported by Microsoft with a patch available; no public exploit identified at time of analysis and it is not listed in CISA KEV.