CVE-2026-27907

EUVD-2026-22445
Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
Wrap or Wraparound
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 25%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_11_23h2
𝑥
< 10.0.22631.6936
microsoftwindows_11_23h2
𝑥
< 10.0.22631.6936
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8246
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8246
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8246
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8246
microsoftwindows_11_26h1
𝑥
< 10.0.28000.1836
microsoftwindows_11_26h1
𝑥
< 10.0.28000.1836
microsoftwindows_server_2022_23h2
𝑥
< 10.0.25398.2274
microsoftwindows_server_2025
𝑥
< 10.0.26100.32690
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 11
23H2 (arm64, x64)
24H2 (arm64, x64)
25H2 (arm64, x64)
26H1 (arm64, x64)
Windows Server 2022
23H2 Server Core
Windows Server 2025
Server Core
Standard