PT-2026-48018 · Microsoft · Windows

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45657

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

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

Description A use after free issue in the Windows Kernel allows an unauthorized attacker to execute code remotely over a network. This flaw enables remote, unauthenticated code execution at SYSTEM level without requiring user interaction. Use after free is a condition where a program continues to use a pointer after it has been freed, which can lead to memory corruption.

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

RCE

Use After Free

Heap Based Buffer Overflow

Weakness Enumeration

CWE-416

CWE-122

Related Identifiers

CVE-2026-45657

Affected Products

Windows

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-45657 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45657 · Vendor Advisory
• https://twitter.com/windowsforum/status/2064432959789158405 · Twitter Post
• https://twitter.com/horizon_secured/status/2064406305625047363 · Twitter Post
• https://twitter.com/vuldb/status/2064418563667210296 · Twitter Post
• https://twitter.com/thezdi/status/2064469642110812337 · Twitter Post