EUVD-2026-73463
GHSA-57v7-r893-9j9g
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
DHCP is unauthenticated by protocol design and network-accessible; impact is availability-only (service crash), with no confidentiality or integrity effect on any system.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
AnalysisAI
Out-of-bounds read in the Windows DHCP Server service enables unauthenticated remote attackers to crash the service via crafted network packets, causing denial of service across any network segment served by the affected host. The flaw (CWE-125) spans Windows Server 2012 through 2025 - a thirteen-year product range - on systems where the DHCP Server role is actively installed. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DHCP Server role must be explicitly installed and actively running on the target system - this role is not present in any default Windows Server installation and requires deliberate administrator configuration. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) accurately reflects the threat: unauthenticated, low-complexity, network-accessible denial of service with no confidentiality or integrity dimension. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply Microsoft security updates to reach the minimum patched build numbers confirmed in EUVD-2026-73463: Windows Server 2025 to 10.0.26100.33438 or later, Windows Server 2022 to 10.0.20348.5622 or later, Windows Server 2019 to 10.0.17763.9245 or later, Windows Server 2016 to 10.0.14393.9512 or later, Windows Server 2012 R2 to 6.3.9600.23397 or later, Windows Server 2012 to 6.2.9200.26349 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems with the DHCP Server role enabled and assess your exposure across the infrastructure. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
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