CVE-2026-50406

EUVD-2026-44083
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7 HIGH
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 19.79%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7548
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7548
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7548
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7548
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7548
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7548
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8875
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8875
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8875
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8875
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2269
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2525
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 10
21H2 (arm64, x64, x86)
KB5099539
22H2 (arm64, x64, x86)
KB5099539
Windows 11
24H2 (arm64, x64)
KB5101650
25H2 (arm64, x64)
KB5101650
26H1 (arm64, x64)
KB5101649
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50406