EUVD-2026-73536
GHSA-275c-whxg-frmw
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel LPE requiring only low-priv session; AC:L as no race condition implied; full C/I/A from SYSTEM-level code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Numeric truncation error in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Spaceport.sys (the Storage Spaces kernel driver) allows a low-privileged authenticated attacker to achieve full system compromise via a numeric truncation error that triggers a heap-based buffer overflow. The vulnerability affects Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 across multiple feature updates, with fixed build numbers confirmed by Microsoft through MSRC. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privilege authenticated session on the target Windows system (PR:L), achievable via any local interactive logon, RDP session, SSH shell, or similar mechanism. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.8 accurately reflects a local, low-privilege, low-complexity kernel LPE. … 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 patch via Windows Update or WSUS as the primary remediation; exact fixed build numbers per version are listed above and confirmed through the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69535. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and prioritize all Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 systems, focusing on servers and administrative workstations. …
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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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