CVE tracker / CVE-2025-47978
CVE-2025-47978
CVE-2025-47978 is the Windows Kerberos Denial of Service Vulnerability. Microsoft rates it Important, CVSS 6.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 8, 2025.
Risk summary
MediumDenial of Service
6.5
CVSS v3 base
2.1%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
More Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.”
How to fix it
Microsoft lists 5 affected products and the update that fixes each:
- KB5062553 · fixed build 10.0.26100.4652
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5062570 · fixed build 10.0.25398.1732
Windows Server 2022, 23H2 Edition (Server Core installation) - KB5062572 · fixed build 10.0.20348.3932
Windows Server 2022 (Server Core installation), Windows Server 2022
What Microsoft changed
- July 8, 2025: Information published.
Details
- Weakness
- CWE-125: Out-of-bounds Read
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- July 8, 2025
- Last revised
- July 8, 2025
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.