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Findings

CVE-2026-108135

Windows Backup Engine Elevation of Privilege Vulnerability

Published Oct 13, 2026 · updated Oct 16, 2026 · Microsoft Windows

Affected Microsoft products: Windows 11 Version 26H2 for x64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · CIRCL Vulnerability Lookup

    Detected

    Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

  2. Oct 14, 2026 · CIRCL Vulnerability Lookup

    Updated

    Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

  3. Oct 16, 2026 · NIST NVD

    Updated

    Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

Affected

  • microsoft Windows 10 Version 22H2 for 32-bit Systemsversion unspecified
  • microsoft Windows 10 Version 22H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 23H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 23H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 24H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 24H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 25H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 25H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H1 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 version 26H1 for x64-based Systemsversion unspecified
  • vendor Microsoft Windows 10 Version 21H2version unspecified
  • vendor Microsoft Windows 10 Version 22H2version unspecified
  • vendor Microsoft Windows 11 Version 23H2version unspecified
  • vendor Microsoft Windows 11 Version 24H2version unspecified
  • vendor Microsoft Windows 11 Version 25H2version unspecified
  • vendor Microsoft Windows 11 Version 26H2version unspecified
  • vendor Microsoft Windows 11 version 23H2version unspecified
  • vendor Microsoft Windows 11 version 26H1version unspecified

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-108135

    Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-108135

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-108135

    30-day exploitation probability 0.3%

    first.org
  • Microsoft Security Update GuideVendor advisoryCVE-2026-108135

    Windows 11 Version 26H2 for x64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems

    msrc.microsoft.com
  • NIST NVDVulnerability recordCVE-2026-108135

    Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References