CVE-2026-45648

Windows Active Directory Domain Services Remote Code Execution Vulnerability

CVE-2026-45648 is fixed in 4 products on 1 platform, first by KB5094128, released June 9, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent

CVSS

8.8

Critical

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0112

66th percentile

<p>Stack-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2022	20348.5256	KB5094128	Jun 9, 2026
Windows Server 2022 (Server Core installation)	20348.5256	KB5094128	Jun 9, 2026
Windows Server 2025	26100.32995	KB5094125	Jun 9, 2026
Windows Server 2025 (Server Core installation)	26100.32995	KB5094125	Jun 9, 2026

Details

Published
June 9, 2026
Weakness
Stack-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45648

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