CVE-2025-47978

Windows Kerberos Denial of Service Vulnerability

CVE-2025-47978 is fixed in 5 products on 1 platform, first by KB5062572, released July 8, 2025. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

6.5

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0215

82nd percentile

<p>Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2022	20348.3932	KB5062572	Jul 8, 2025
Windows Server 2022 (Server Core installation)	20348.3932	KB5062572	Jul 8, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1732	KB5062570	Jul 8, 2025
Windows Server 2025	26100.4652	KB5062553	Jul 8, 2025
Windows Server 2025 (Server Core installation)	26100.4652	KB5062553	Jul 8, 2025

Details

Published
July 8, 2025
Weakness
Out-of-bounds Read
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47978

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