EUVD-2026-56671
GHSA-6jpx-3jw7-m427
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack via symlink requires existing low-privilege session; DHCP service context yields full system impact with no user interaction.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows DHCP Server exploits improper symbolic link resolution (CWE-59), allowing an authenticated local attacker with low privileges to fully compromise system confidentiality, integrity, and availability. The flaw affects Windows Server 2012 through 2025 and select Windows 10 builds where the DHCP Server role is active. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) an authenticated local user account on the target host - PR:L in the CVSS vector confirms low but non-zero privilege is required; unauthenticated remote exploitation is not possible per AV:L; (2) the Windows DHCP Server role must be installed and running on the target system - this is a server role not present by default on workstations, limiting exposure to machines explicitly configured as DHCP servers; (3) the attacker must be able to create a symbolic link or junction in a directory accessible to their account that the DHCP service accesses - standard Users can create symlinks on Windows if the 'Create symbolic links' privilege is granted (SeCreateSymbolicLinkPrivilege), which is not default for non-admin users; this is a meaningful limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is grounded in a concrete and well-understood attack class: link following by a privileged service. … 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 the Microsoft-released patches via Windows Update or WSUS. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running the DHCP Server role across Windows Server 2012, 2016, 2019, 2022, and 2025 environments and coordinate with infrastructure teams on patching urgency. …
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Same weakness CWE-59 – Improper Link Resolution Before File Access
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External POC / Exploit Code
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