CVE-2026-108135: Windows Backup Engine Elevation of Privilege Vulnerability
Published Oct 13, 2026
·Updated
Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
Other sources
Windows Backup Engine Elevation of Privilege Vulnerability
— Microsoft
Affected Software
49 affected componentsFixes available
Microsoft Windows Backup Engine
Microsoft Windows 11=23H2
10.0.22631.7652
Microsoft Windows 11=26H2
10.0.26300.9711
Microsoft Windows 11=25H2
10.0.26200.9711
Microsoft Windows 11=26H1
10.0.28000.3231
Microsoft Windows 11=26H2
10.0.26300.9711
Microsoft Windows 10=22H2
10.0.19044.7807
Microsoft Windows 11=25H2
10.0.26200.9711
Microsoft Windows 11=26H1
10.0.28000.3231
Microsoft Windows 11=24H2
10.0.26100.9711
Microsoft Windows 11=24H2
10.0.26100.9711
Microsoft Windows 11=23H2
10.0.22631.7652
Microsoft Windows 10=22H2
10.0.19044.7807
Microsoft Windows 10=21H2
10.0.19044.7807
Microsoft Windows 10=22H2
10.0.19044.7807
Microsoft Windows 10=21H2
10.0.19044.7807
Microsoft Windows 10=21H2
10.0.19044.7807
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 11 23h2<10.0.22631.7652
Microsoft Windows 11 23h2<10.0.22631.7652
Microsoft Windows 11 24h2<10.0.26100.9711
Microsoft Windows 11 24h2<10.0.26100.9711
Microsoft Windows 11 25h2<10.0.26200.9711
Microsoft Windows 11 25h2<10.0.26200.9711
Microsoft Windows 11 26h1<10.0.28000.3231
Microsoft Windows 11 26h1<10.0.28000.3231
Microsoft Windows 11 26h2<10.0.26300.9711
Microsoft Windows 11 26h2<10.0.26300.9711
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9711
10.0.26200.9711
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9711
10.0.26300.9711
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3231
10.0.28000.3231
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9711
10.0.26100.9711
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3231
10.0.28000.3231
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9711
10.0.26300.9711
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7652
10.0.22631.7652
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9711
10.0.26200.9711
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9711
10.0.26100.9711
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7652
10.0.22631.7652
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Remediation
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
CVE Published
via MITRE·07:01 PM
Data Sourced
via MITRE·07:01 PM
DescriptionSeverity
Data Sourced
via NVD·07:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Can this be exploited remotely?
The available vector is local only. An attacker would need access to the affected system rather than being able to exploit it over the network.
2
What level of access does an attacker need?
The attacker must already be authorized with low privileges on the system. No user interaction is required, but exploitation has high attack complexity.
3
Which systems should be included in triage?
Review deployments of Microsoft Windows 10, Microsoft Windows 11, and Microsoft Windows Backup Engine listed for this CVE.