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Windows SCSI Driver CVE-2026-78452

| EUVDEUVD-2026-73807 MEDIUM
Out-of-bounds Read (CWE-125)
2026-09-08 secure@microsoft.com GHSA-xwvr-7rvw-7j9c
4.6
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
4.6 MEDIUM
AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
4.6 MEDIUM

Physical access is required to attach a malicious device; no privileges needed; impact is read-only confidentiality disclosure with no integrity or availability effect.

3.1 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Metadata Corrected
Sep 08, 2026 - 23:40 vuln.today
tag: Buffer Overflow removed
Analysis Generated
Sep 08, 2026 - 22:54 vuln.today
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:20 cve.org
MEDIUM 4.6

DescriptionCVE.org

Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information with a physical attack.

AnalysisAI

Out-of-bounds read in the Microsoft Windows SCSI Class System File driver (CWE-125) exposes kernel memory contents to an attacker with physical access to the target machine. The flaw affects a broad range of Windows 10, Windows 11, and Windows Server releases, from build 10.0.17763 through current 25H2 and Server 2025 lines. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Physical access to the target machine is mandatory - the AV:P vector rules out any remote or network-based exploitation path. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N yields a base score of 4.6, which accurately reflects the physical access prerequisite that fundamentally constrains real-world risk. … 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 The primary fix is to apply the Microsoft Security Update released via Windows Update or WSUS, targeting the build thresholds specified per version: Windows 10 1809/Server 2019 to 10.0.17763.9245 or later; Windows 10 21H2 to 10.0.19044.7725 or later; Windows 10 22H2 to 10.0.19045.7725 or later; Windows 11 23H2 to 10.0.22631.7582 or later; Windows 11 24H2/Server 2025 to 10.0.26100.9445 (client) or 10.0.26100.33438 (server) or later; Windows 11 25H2 to 10.0.26200.9445 or later; Windows 11 26H1 to 10.0.28000.2954 or later; Windows Server 2022 to 10.0.20348.5622 or later. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-78452 vulnerability details – vuln.today

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