EUVD-2026-73519
GHSA-8wwq-5gm3-3jqr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel driver exploitation requires authenticated low-privileged session; no user interaction or complex conditions needed; full system compromise on successful exploit.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Partition Management Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation to SYSTEM-level via a heap-based buffer overflow in the Windows Partition Management Driver affects multiple Windows 10, Windows 11, and Windows Server releases. An authenticated local attacker with low privileges can exploit the CWE-122 heap overflow to achieve full confidentiality, integrity, and availability impact on the local system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local user account with at least low privileges (PR:L per CVSS) - no special role, group membership, or administrative rights are needed beyond the ability to log on interactively or via Remote Desktop. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H yields a base score of 7.8, reflecting a local attack with low complexity and low privilege requirements resulting in full system compromise. … 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 vendor-released cumulative update corresponding to each affected Windows build: Windows 10 21H2/22H2 should target build 10.0.19044.7725 or 10.0.19045.7725 respectively; Windows 11 23H2 should reach 10.0.22631.7582; Windows 11 24H2 and Windows Server 2025 should reach 10.0.26100.9445 (client) or 10.0.26100.33438 (server); Windows 11 25H2 should reach 10.0.26200.9445; Windows 11 26H1 should reach 10.0.28000.2954; and Windows Server 2022 should reach 10.0.20348.5622. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 10, Windows 11, and Windows Server systems in production and non-production environments using your CMDB or asset management tools. …
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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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