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Microsoft CVE-2026-40407

| EUVD-2026-29667 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-05-12 microsoft GHSA-6p5f-2v3f-hh8g
Buffer Overflow Heap Overflow Microsoft
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 - 16:58 nvd
HIGH 7.8

DescriptionNVD

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Analysis

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

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CVE-2026-40407 vulnerability details – vuln.today
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