CVE-2026-27907

Published: Apr 14, 2026

Modified: Jun 1, 2026

PUBLISHED

CVSS v3.1

7.8

HIGH

Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

Vendor	Product	Versions
Microsoft	Windows 11 version 22H3	affected `10.0.22631.0 - < 10.0.22631.6936`
Microsoft	Windows 11 Version 23H2	affected `10.0.22631.0 - < 10.0.22631.6936`
Microsoft	Windows 11 Version 24H2	affected `10.0.26100.0 - < 10.0.26100.8246`
Microsoft	Windows 11 Version 25H2	affected `10.0.26200.0 - < 10.0.26200.8246`
Microsoft	Windows 11 version 26H1	affected `10.0.28000.0 - < 10.0.28000.1836`
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	affected `10.0.25398.0 - < 10.0.25398.2274`
Microsoft	Windows Server 2025	affected `10.0.26100.0 - < 10.0.26100.32690`
Microsoft	Windows Server 2025 (Server Core installation)	affected `10.0.26100.0 - < 10.0.26100.32690`

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

vendor-advisory

patch

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