CVE-2026-47288: Windows Kerberos Key Distribution Center (KDC) Remote Code Execution

Overview

Severity

High (CVSS 7.1)

CVSS Vector

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Patch Tuesday

2026-Jun

Released

2026-06-09

Description

Integer overflow or wraparound in Windows Kerberos allows an authorized attacker to execute code over an adjacent network.

FAQ

How could an attacker exploit this vulnerability? An attacker who is already authenticated to the domain could send specially crafted authentication-related data to a domain controller, causing the affected Windows component to incorrectly handle memory. This could allow the attacker to disrupt the service or gain higher privileges on the domain controller without any user interaction. According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to prepare the target environment to improve exploit reliability.

Affected Products (12)

Windows

• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows Server 2025 (Server Core installation)
• Windows Server 2025
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

ESU

• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (6)

• 5094123
• 5094128
• 5094125
• 5094122
• 5094042
• 5094041

Acknowledgments

Microsoft

Revision History

• 2026-06-09: Information published.