EUVD-2026-43850
GHSA-vmqg-mgpj-hj4m
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Requires an authenticated local user (PR:L, AV:L) and hard-to-win memory conditions (AC:H); successful kernel EoP yields full SYSTEM control, so C/I/A all High with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Buffer over-read in Windows Redirected Drive Buffering allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Redirected Drive Buffering Subsystem (RDBSS) lets an authenticated low-privileged attacker read memory beyond an allocated buffer to elevate to higher privileges. The flaw affects a broad range of currently-supported Windows client and server releases (Windows 10 1607 through Windows 11 26H1, Windows Server 2012 through Server 2025) and carries a CVSS 7.0 (High) rating. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already hold a valid low-privileged local account and to be able to execute code on the target host (PR:L, AV:L, no user interaction), and to reach the Redirected Drive Buffering Subsystem (RDBSS) code path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H = 7.0) describes a locally exploitable, authenticated bug with high attack complexity but full CIA impact within an unchanged scope. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already obtained low-privileged access to a Windows host - for example through phishing, a compromised service account, or a shared terminal server - runs a crafted program that drives the RDBSS driver into reading past a buffer boundary. By satisfying the required memory-state conditions (reflecting the high attack complexity), they leverage the kernel over-read to disclose kernel memory or corrupt kernel state and escalate to SYSTEM. … |
| Remediation | Apply the Microsoft security update for your specific Windows build as the primary and complete fix - Patch available per vendor advisory; consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50372 for the exact KB article and fixed build number for each affected OS version, as no single cross-version fix string is provided in the input. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows 10 (builds 1607-26H1), Windows 11, or Windows Server 2012-2025, and assess deployment criticality by business function. …
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Same weakness CWE-126 – Buffer Over-read
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External POC / Exploit Code
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