Summary
Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
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.
Security updates
10.0.17763.8880 — https://support.microsoft.com/help/5094123
10.0.20348.5256 — https://support.microsoft.com/help/5094128
10.0.26100.32995 — https://support.microsoft.com/help/5094125
10.0.14393.9234 — https://support.microsoft.com/help/5094122
6.2.9200.26132 — https://support.microsoft.com/help/5094042
6.3.9600.23228 — https://support.microsoft.com/help/5094041
Vulnerabilities 1
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High 7.1
Windows Kerberos Key Distribution Center (KDC) Remote Code Execution
Integer overflow or wraparound in Windows Kerberos allows an authorized attacker to execute code over an adjacent network.
Revision history
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#1
Information published.
References
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CVE-2026-47288 Windows Kerberos Key Distribution Center (KDC) Remote Code Execution - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47288
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss