EUVD-2026-44308
GHSA-v2gx-jj2v-qjcg
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Remote unauthenticated DHCP traffic with low complexity yields AV:N/AC:L/PR:N/UI:N; pure availability loss gives A:H with C/I:N.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionNVD
Uncontrolled resource consumption in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
AnalysisAI
Denial of service in the Microsoft Windows DHCP Server role allows a remote, unauthenticated attacker to exhaust server resources and knock the service offline over the network. The flaw affects a broad range of supported Windows Server releases (2012 through 2025, including Server Core installations) and carries a CVSS 7.5 rating driven entirely by availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target host has the Windows DHCP Server role installed and enabled and that the attacker can reach it with DHCP protocol traffic (UDP 67) on a routable or shared network segment. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) describes a genuinely low-barrier attack: network reachable, low complexity, no privileges, and no user interaction, with a pure high-availability impact and no confidentiality or integrity effect. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a foothold on the local network - for example a compromised workstation or a rogue device plugged into an accessible port - sends a flood of crafted DHCP requests to the server on UDP 67. Because no authentication or user interaction is required and complexity is low, the server's resources are exhausted and it stops issuing or renewing leases, causing clients to lose network connectivity as their addresses expire. … |
| Remediation | Apply the Microsoft security update for CVE-2026-58627 via the MSRC Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58627; patch status is 'Patch available per vendor advisory,' though no single fixed build number is given in the input, so consult the advisory for the exact KB per OS version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows Server systems running the DHCP role across your infrastructure (versions 2012 through 2025, including Server Core installations) and establish a patching priority list, segregating production DHCP servers from test environments. …
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
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