CVE-2026-45657

Microsoft Windows 11 version 23H2 CWE-416

Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

CVSS Score

9.8

Critical

EPSS — Exploit Probability

15%

Riskier than 97% of all CVEs · checked 2026-09-08

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

Remediation

Patch available

Vendor fix published

1 article across 1 outlet · first covered Jun 9, 2026 · latest Jun 9, 2026

Coverage timeline