PT-2026-58378 · Microsoft · Windows Kernel

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-50399

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 Kernel (affected versions not specified)

Description An out-of-bounds read in the Windows Kernel allows an authorized attacker to elevate privileges locally. An out-of-bounds read occurs when the software reads data past the end of the intended buffer, which can lead to unauthorized access to memory.

Recommendations Apply the July update to resolve this issue.

Fix

LPE

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-50399

Affected Products

Windows Kernel

References · 5

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-50399 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-50399 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50399 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-50399 · Security Note
• https://twitter.com/windowsforum/status/2077344459704942867 · Twitter Post