Advisory severityHigh7.8Microsoft Server

High [CVE-2026-87707] Windows Fax and Scan Service Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-87707 affecting Windows Server 2016, Windows Server 2012 R2, Windows Server 2022.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-87707 Source published Oct 13, 2026Source updated Oct 13, 2026

VulniPulse record published Oct 13, 2026Record updated Oct 13, 2026

CVE-2026-87707

Affected products & platforms

Microsoft ServerWindows Server

Open source advisory

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Summary

Windows Fax and Scan Service Elevation of Privilege Vulnerability

Affected products named by the advisory: Windows Server 2016; Windows Server 2012; Windows Server 2012 R2; Windows Server 2022; and 2 more.

Affected products named by the advisory: Windows Server 2025; Windows Server 2019.

Affected versions

Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.9512
Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.9245
Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.7725
Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.7725
Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.7582
Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.7582
Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.9445
Windows 11 Version 25H2 10.0.26200.0 before 10.0.26200.9445
Windows 11 version 26H1 10.0.28000.0 before 10.0.28000.2954
Windows Server 2012 6.2.9200.0 before 6.2.9200.26349
Windows Server 2012 (Server Core installation) 6.2.9200.0 before 6.2.9200.26349
Windows Server 2012 R2 6.3.9600.0 before 6.3.9600.23398

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions

KB5123099 (build 10.0.14393.9512)
KB5122878 (build 10.0.19044.7725)
KB5123065 (build 6.2.9200.26349)
KB5124008 (build 10.0.26100.9445)
KB5123066 (build 6.3.9600.23398)
KB5122876 (build 10.0.17763.9245)
KB5122882 (build 10.0.20348.5622)
KB5122880 (build 10.0.22631.7582)

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Install the applicable security update for your platform: KB5123099, KB5122878, KB5123065, KB5124008, KB5123066, KB5122876 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

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