CVE-2025-59514: Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-11 · updated 2026-06-17
Weakness: CWE-269

Description

Improper privilege management in Microsoft Streaming Service allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Windows 10 1607: before 10.0.14393.8594 — fixed in 10.0.14393.8594
Microsoft Windows 10: before 10.0.17763.8027 — fixed in 10.0.17763.8027
Microsoft Windows 10: before 10.0.19044.6575 — fixed in 10.0.19044.6575
Microsoft Windows 10: before 10.0.19045.6575 — fixed in 10.0.19045.6575
Microsoft Windows 11: before 10.0.22631.6199 — fixed in 10.0.22631.6199
Microsoft Windows 11: before 10.0.26100.7092 — fixed in 10.0.26100.7092
Microsoft Windows 11 25H2: before 10.0.26200.7092 — fixed in 10.0.26200.7092
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8594 — fixed in 10.0.14393.8594
Microsoft Windows Server 2019: before 10.0.17763.8027 — fixed in 10.0.17763.8027
Microsoft Windows Server 2022: before 10.0.20348.4346 — fixed in 10.0.20348.4346
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1965 — fixed in 10.0.25398.1965
Microsoft Windows Server 2025: before 10.0.26100.7092 — fixed in 10.0.26100.7092
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.8594 — fixed in 10.0.14393.8594
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.8027 — fixed in 10.0.17763.8027
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.6575 — fixed in 10.0.19044.6575
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.6575 — fixed in 10.0.19045.6575
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.6199 — fixed in 10.0.22631.6199
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.6199 — fixed in 10.0.22631.6199
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.7171 — fixed in 10.0.26100.7171
Microsoft Windows 11 25H2: from 10.0.26200.0 before 10.0.26200.7171 — fixed in 10.0.26200.7171
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.28021 — fixed in 6.1.7601.28021
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.23624 — fixed in 6.0.6003.23624
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25768 — fixed in 6.2.9200.25768
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22869 — fixed in 6.3.9600.22869
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8594 — fixed in 10.0.14393.8594
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.8027 — fixed in 10.0.17763.8027
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.4405 — fixed in 10.0.20348.4405
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1965 — fixed in 10.0.25398.1965

How to fix

Upgrade to a fixed version: Microsoft Windows 10 1607 10.0.14393.8594; Microsoft Windows 10 10.0.17763.8027; Microsoft Windows 10 10.0.19044.6575; Microsoft Windows 10 10.0.19045.6575; Microsoft Windows 11 10.0.22631.6199; Microsoft Windows 11 10.0.26100.7092; Microsoft Windows 11 25H2 10.0.26200.7092; Microsoft Windows Server 2016 10.0.14393.8594; Microsoft Windows Server 2019 10.0.17763.8027; Microsoft Windows Server 2022 10.0.20348.4346; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1965; Microsoft Windows Server 2025 10.0.26100.7092. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59514

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