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

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-09 · updated 2026-09-24
Weakness: CWE-190

Description

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

Affected products

Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.9234 — fixed in 10.0.14393.9234
Microsoft Windows Server 2019: before 10.0.17763.8880 — fixed in 10.0.17763.8880
Microsoft Windows Server 2022: before 10.0.20348.5256 — fixed in 10.0.20348.5256
Microsoft Windows Server 2025: before 10.0.26100.32995 — fixed in 10.0.26100.32995
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.26132 — fixed in 6.2.9200.26132
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.23228 — fixed in 6.3.9600.23228
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.9234 — fixed in 10.0.14393.9234
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.8880 — fixed in 10.0.17763.8880
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.5256 — fixed in 10.0.20348.5256
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.32995 — fixed in 10.0.26100.32995

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.9234; Microsoft Windows Server 2019 10.0.17763.8880; Microsoft Windows Server 2022 10.0.20348.5256; Microsoft Windows Server 2025 10.0.26100.32995; Microsoft Windows Server 2012 6.2.9200.26132; Microsoft Windows Server 2012 R2 6.3.9600.23228; Microsoft Windows Server 2016 10.0.14393.9234; Microsoft Windows Server 2019 10.0.17763.8880; Microsoft Windows Server 2022 10.0.20348.5256; Microsoft Windows Server 2025 10.0.26100.32995. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47288

Get alerted when CVE-2026-47288 or the next vulnerability affects your stack