Elevation of Privilege Vulnerability in Windows Backup Engine by Microsoft
CVE-2026-108135

7HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 23h2
Windows 11 Version 23h2
Vendor
CVE Published:
13 October 2026

What is CVE-2026-108135?

The Windows Backup Engine has a vulnerability that allows an authorized attacker to escalate their privileges through improper link resolution before file access. This flaw could permit an attacker to gain unauthorized access to sensitive information or execute harmful commands on a compromised system. It is crucial for users to apply any available patches to mitigate risks associated with this vulnerability.

Affected Version(s)

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7807

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19044.7807

Windows 11 version 23H2 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7652

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.