Windows Backup Engine Elevation of Privilege Vulnerability

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What is CVE-2026-108135?

CVE-2026-108135 is a vulnerability classified as Improper Link Resolution Before File Access ('Link Following'), affecting Windows 10 Version 21H2 (affected versions: 10.0.19044.0 – < 10.0.19044.7807), Windows 10 Version 22H2 (affected versions: 10.0.19045.0 – < 10.0.19045.7807), Windows 11 version 23H2 (affected versions: 10.0.22631.0 – < 10.0.22631.7652), and 4 more products. This vulnerability is rated High, with a CVSS score of 7. Current sources do not report this vulnerability as exploited.

Overview

Original source data

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

Affected products and scope

The analysis could not be completed. The original vulnerability data remains available below.

Technical details

The analysis could not be completed. The original vulnerability data remains available below.

Exploitability

The analysis could not be completed. The original vulnerability data remains available below.

Technical impact

The analysis could not be completed. The original vulnerability data remains available below.

Business impact

The analysis could not be completed. The original vulnerability data remains available below.

Remediation

The analysis could not be completed. The original vulnerability data remains available below.

Detection

The analysis could not be completed. The original vulnerability data remains available below.

Sources (6)

GCVE / Vulnerability-Lookup

microsoft (CNA)

msrc.microsoft.com

High

Provider: Microsoft
Primary affected product: Windows 10 Version 21H2
Affected versions: 10.0.19044.0 – < 10.0.19044.7807
Published: 10/13/2026

Exploitation status: Not exploited
Patch status: Fix available
CISA KEV date: -
CISA KEV due date: -

Estimated exploitation probability (EPSS): 0.0027
Estimated exploitation percentile: 18.21%
Attack capability: Local

Products using this technology (0): -

Classification: CWE-59
Equivalent IDs: GHSA-wfr6-h9hr-j5vv

View details

/GHSA-wfr6-h9hr-j5vv

CVSS3

(CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Attack complexity: High
Attack vector: Local
Confidentiality impact: High
Integrity impact: High
Privileges required: Low
User interaction required: None

CVSS2

(Not available)

Attack complexity: -
Attack vector: -
Confidentiality impact: -
Integrity impact: -
Privileges required: -
User interaction required: -

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