7.0High

CVE-2026-108135Windows Backup Engine Elevation of Privilege Vulnerability

Microsoft Windows 10 Version 21H2; Microsoft Windows 10 Version 22H2; Microsoft Windows 11 version 23H2; Microsoft Windows 11 Version 23H2 Published: 2026-10-13 22:01 (19 days ago)

Description

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

Weakness (CWE): CWE-59

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
microsoft	windows 10 21H2	10.0.19044.0 – < 10.0.19044.7807
microsoft	windows 10 22H2	10.0.19045.0 – < 10.0.19045.7807
Microsoft	Windows 10 Version 21H2	10.0.19044.0 – < 10.0.19044.7807
Microsoft	Windows 10 Version 22H2	10.0.19045.0 – < 10.0.19045.7807
microsoft	windows 11 23H2	10.0.22631.0 – < 10.0.22631.7652
microsoft	windows 11 24H2	10.0.26100.0 – < 10.0.26100.9711
microsoft	windows 11 25H2	10.0.26200.0 – < 10.0.26200.9711
microsoft	windows 11 26H1	10.0.28000.0 – < 10.0.28000.3231
microsoft	windows 11 26h2	< 10.0.26300.9711
Microsoft	Windows 11 version 23H2	10.0.22631.0 – < 10.0.22631.7652
Microsoft	Windows 11 Version 24H2	10.0.26100.0 – < 10.0.26100.9711
Microsoft	Windows 11 Version 25H2	10.0.26200.0 – < 10.0.26200.9711
Microsoft	Windows 11 version 26H1	10.0.28000.0 – < 10.0.28000.3231
Microsoft	Windows 11 Version 26H2	10.0.26300.0 – < 10.0.26300.9711
microsoft	windows 11 version 26h2 for arm64-based systems	10.0.26300.0 – < 10.0.26300.9711

References and patches

Windows Backup Engine Elevation of Privilege Vulnerability vendor-advisorypatchPatchVendor Advisory

CPE matches (NVD) (16)

cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:* < 10.0.26300.9711

CVSS score

7.0High

Source: microsoft · CVSS 3.1

Attack vector: Local
Attack complexity: High
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

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

All scores (2)

cna	CVSS 3.1	7.0High
secure@microsoft.com	CVSS 3.1	7.0High

EPSS (chance of exploitation in 30 days)

0.30%

higher than 23% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: total

Timeline

ID reserved2026-10-09
Published2026-10-13 22:01
Reached IP-DB2026-10-24 23:27
Last updated2026-10-31 21:13

Assigned by (CNA): microsoft
NVD status: Analyzed

View at source: CVE.org · NVD

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