Review reviewHigh

CVE-2026-47288

Microsoft Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2

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

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.50%

Technical severityCVSS 7.1

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

Product: Microsoft Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2
Affected versions: >= 6.2.9200.0 < 6.2.9200.26132, >= 6.3.9600.0 < 6.3.9600.23228, >= 10.0.14393.0 < 10.0.14393.9234, >= 10.0.17763.0 < 10.0.17763.8880, >= 10.0.20348.0 < 10.0.20348.5256, >= 10.0.26100.0 < 10.0.26100.32995, r2, < 10.0.14393.9234, < 10.0.17763.8880, < 10.0.20348.5256, < 10.0.26100.32995
Fixed versions: 10.0.14393.9234, 10.0.17763.8880, 10.0.20348.5256, 10.0.26100.32995

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.