CVE tracker / CVE-2025-49716
CVE-2025-49716
CVE-2025-49716 is the Windows Netlogon Denial of Service Vulnerability. Microsoft rates it Important, CVSS 7.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 8, 2025.
Risk summary
HighDenial of Service
7.5
CVSS v3 base
1.6%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Unlikely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Uncontrolled resource consumption in Windows Netlogon allows an unauthorized attacker to deny service over a network.”
How to fix it
Microsoft lists 17 affected products and the update that fixes each:
- KB5062557 · fixed build 10.0.17763.7558
Windows Server 2019 (Server Core installation), Windows Server 2019 - KB5062560 · fixed build 10.0.14393.8246
Windows Server 2016 (Server Core installation), Windows Server 2016 - 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 - KB5062592 · fixed build 6.2.9200.25573
Windows Server 2012 (Server Core installation), Windows Server 2012 - KB5062597 · fixed build 6.3.9600.22676
Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2 - KB5062624 · fixed build 6.0.6003.23418
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation), Windows Server 2008 for x64-based Systems Service Pack 2, Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation), Windows Server 2008 for 32-bit Systems Service Pack 2 - KB5062632 · fixed build 6.1.7601.27820
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for x64-based Systems Service Pack 1
What Microsoft changed
- August 18, 2025: Updated first FAQ to state that CVE-2020-0674 has now been issued to address this vulnerability. This is an informational change only.
- July 8, 2025: Information published.
Details
- Weakness
- CWE-400: Uncontrolled Resource Consumption
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- July 8, 2025
- Last revised
- August 18, 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.