CVE-2025-33050: DHCP Server Service Denial of Service Vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-10 · updated 2026-06-17
Weakness: CWE-693

Description

Protection mechanism failure in Windows DHCP Server allows an unauthorized attacker to deny service over a network.

Affected products

Microsoft Windows Server 2016: before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows Server 2019: before 10.0.17763.7434 — fixed in 10.0.17763.7434
Microsoft Windows Server 2022: before 10.0.20348.3745 — fixed in 10.0.20348.3745
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1665 — fixed in 10.0.25398.1665
Microsoft Windows Server 2025: before 10.0.26100.4270 — fixed in 10.0.26100.4270
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8148 — fixed in 10.0.14393.8148
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7434 — fixed in 10.0.17763.7434
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.3807 — fixed in 10.0.20348.3807
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1665 — fixed in 10.0.25398.1665
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.4349 — fixed in 10.0.26100.4349

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.8148; Microsoft Windows Server 2019 10.0.17763.7434; Microsoft Windows Server 2022 10.0.20348.3745; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1665; Microsoft Windows Server 2025 10.0.26100.4270; Microsoft Windows Server 2016 10.0.14393.8148; Microsoft Windows Server 2019 10.0.17763.7434; Microsoft Windows Server 2022 10.0.20348.3807; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1665; Microsoft Windows Server 2025 10.0.26100.4349. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33050

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