PT-2026-47876 · Microsoft · Projected File System Filter Driver+1

CVE-2026-42828 · Published 2026-06-09 · Updated 2026-06-10

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Projected File System Filter Driver (affected versions not specified)

Description A buffer over-read in the Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally. A buffer over-read occurs when a system reads more data from a buffer than is actually available, potentially exposing sensitive information from adjacent memory locations.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Buffer Over-read

Weakness Enumeration

CWE-126

Related Identifiers

BDU:2026-08307

CVE-2026-42828

Affected Products

Projected File System Filter Driver

Windows

References · 7

• https://bdu.fstec.ru/vul/2026-08307 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-42828 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42828 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42828 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-42828 · Security Note
• https://twitter.com/windowsforum/status/2064465457134858745 · Twitter Post
• https://t.me/cveNotify/166925 · Telegram Post