PT-2026-47876 · Microsoft · Windows 10 Version 1809+9

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-42828

Mitre

CVSS v3.1

7.8

High

Base vector

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

Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

Fix

Buffer Over-read

Weakness Enumeration

CWE-126

Related Identifiers

CVE-2026-42828

Affected Products

Windows 10 Version 1809

Windows 10 Version 21H2

Windows 10 Version 22H2

Windows 11 Version 23H2

Windows 11 Version 24H2

Windows 11 Version 25H2

Windows 11 Version 26H1

Windows Server 2019

Windows Server 2022

Windows Server 2025

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42828 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42828 · Security Note