EUVD-2026-73627
GHSA-mc8x-xr7r-c6rm
Severity by source
AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:A reflects DHCP's adjacent-network protocol scope; PR:L matches 'authorized attacker' language; full C/I/A reflects code execution on the server host.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows DHCP Server allows an authorized attacker to execute code over an adjacent network.
AnalysisAI
Remote code execution via use-after-free (CWE-415) in the Windows DHCP Server service allows an authorized attacker on the same network segment to achieve full system compromise across a wide range of Windows Server editions from 2012 through 2025. The CVSS vector (AV:A/PR:L) confirms exploitation is constrained to adjacent-network attackers holding at least low-privilege access, yet the resulting C:H/I:H/A:H impact reflects complete server takeover if the flaw is triggered. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concrete prerequisites: (1) the attacker must be positioned on the same network segment as the target Windows DHCP Server - either physically adjacent (same LAN/VLAN) or via a routed path that reaches the DHCP service on UDP/67 - ruling out direct internet exploitation; (2) the attacker must hold at least low-level authorized access to the network (PR:L per CVSS vector), meaning anonymous internet actors cannot exploit this without first gaining some foothold. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.0 score reflects a meaningful but bounded threat profile: AV:A limits exploitation to attackers already on the same Layer-2 or Layer-3 segment as the DHCP server, and PR:L indicates some level of authorized access is required rather than fully anonymous exploitation from the internet. … 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 | Microsoft has released patches via Windows Update for all affected versions; organizations should apply the cumulative update that brings each build to or above the following fixed versions: Server 2025 → 10.0.26100.33438, Server 2022 → 10.0.20348.5622, Server 2019/Win10 1809 → 10.0.17763.9245, Server 2016/Win10 1607 → 10.0.14393.9512, Server 2012 R2 → 6.3.9600.23397, Server 2012 → 6.2.9200.26349. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server instances running DHCP service (editions 2012 through 2025) to establish exposure scope. …
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Same weakness CWE-415 – Double Free
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External POC / Exploit Code
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