EUVD-2026-56675
GHSA-2hvq-h28x-grj9
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:A reflects DHCP's broadcast-domain scope; PR:N because DHCP is unauthenticated by protocol design; full C/I/A from heap overflow enabling arbitrary code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over an adjacent network.
AnalysisAI
Unauthenticated code execution in Windows DHCP Server allows an attacker positioned on an adjacent network segment to trigger a heap-based buffer overflow and achieve full system compromise. The vulnerability spans a wide range of Microsoft server and desktop platforms, from Windows Server 2012 through Windows Server 2025 and select Windows 10 builds, making it broadly relevant in Windows-centric enterprise environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DHCP Server service must be installed and actively running on the target host - this role is not enabled by default on all Windows Server installations and is not present on standard Windows 10 deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 with vector AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H accurately captures the severity profile: no privileges, no user interaction, and low attack complexity result in a full-triad impact on the DHCP server host. … 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 | The primary remediation is to apply the vendor-released security update via Windows Update or WSUS, targeting the specific fixed builds documented in the EUVD: Windows Server 2025 10.0.26100.33296 or later, Windows Server 2022 10.0.20348.5499 or later, Windows Server 2019 10.0.17763.9115 or later, Windows Server 2016 10.0.14393.9418 or later, Windows Server 2012 R2 6.3.9600.23337 or later, and Windows Server 2012 6.2.9200.26279 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows DHCP Server, particularly Windows Server 2012-2025 and affected Windows 10 builds, and assess your network topology for systems with adjacent-segment exposure. …
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External POC / Exploit Code
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