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Severe, 6 weeks977Projects326

977 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-70184

Microsoft Windows Backup Engine: privilege escalation

Microsoft

CVE-2026-70184 · Published Oct 13, 2026 · updated Oct 28, 2026

High7.8
Fix: upgrade to 10.0.19044.7807 or later (7 fixed versions below)
Microsoft advisory

Improper resolution of path equivalence in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

Affected versions

PackageAffectedFixed in
Windows 10 Version 21H2
Product
>= 10.0.19044.0, < 10.0.19044.780710.0.19044.7807
Windows 10 Version 22H2
Product
>= 10.0.19045.0, < 10.0.19045.780710.0.19045.7807
Windows 11 Version 23H2
Product
>= 10.0.22631.0, < 10.0.22631.765210.0.22631.7652
Windows 11 Version 24H2
Product
>= 10.0.26100.0, < 10.0.26100.971110.0.26100.9711
Windows 11 Version 25H2
Product
>= 10.0.26200.0, < 10.0.26200.971110.0.26200.9711
Windows 11 Version 26H2
Product
>= 10.0.26300.0, < 10.0.26300.971110.0.26300.9711
Windows 11 version 23H2
Product
>= 10.0.22631.0, < 10.0.22631.765210.0.22631.7652
Windows 11 version 26H1
Product
>= 10.0.28000.0, < 10.0.28000.323110.0.28000.3231
Details and references
CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-41

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