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Microsoft CVE-2026-40397

| EUVD-2026-29659 HIGH
Integer Underflow (CWE-191)
2026-05-12 microsoft GHSA-864v-w6fx-r2g4
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
CVE Published
May 12, 2026 - 16:59 nvd
HIGH 7.8

DescriptionNVD

Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Analysis

Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

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CVE-2026-40397 vulnerability details – vuln.today

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