PT-2026-58170 · Microsoft · Windows Kernel

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-49798

Positive Technologies (AI Summary)

CVSS v3.1

9.3

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Kernel (affected versions not specified)

Description A use-after-free condition in the Windows Kernel allows an unauthorized attacker to elevate privileges locally, which can lead to full system compromise.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-49798

Affected Products

Windows Kernel

References · 5

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-49798 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49798 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-49798 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-49798 · Security Note
• https://vulnipulse.com/vendors/microsoft · Reddit Post