EUVD-2026-73231
GHSA-pmx3-vwcw-fxcv
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector with low privileges required; heap overflow in AD DS component achieves full triad impact on the local system with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in Windows Active Directory Domain Services enables a locally authenticated attacker to escalate privileges to a higher integrity level, achieving full confidentiality, integrity, and availability compromise of the affected system. The vulnerability affects a broad range of Windows versions from Server 2016 through Server 2025, as well as Windows 10 and 11 across multiple feature release channels. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a locally authenticated session with at least low-privilege credentials (PR:L) - any valid domain or local Windows account satisfies this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a local privilege escalation with low attack complexity and no user interaction requirement - a straightforward, repeatable LPE class. … 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, targeting the build numbers listed in the affected products section - the fix versions are platform-specific (e.g., 10.0.26100.33438 for Server 2025, 10.0.20348.5622 for Server 2022, 10.0.14393.9512 for Server 2016/1607). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all affected Windows Server (2016-2025) and Windows 10/11 systems with AD DS roles or services, and confirm patch availability from Microsoft. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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