CVE-2025-49734: PowerShell Direct Elevation of Privilege Vulnerability

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-09 · updated 2026-06-17
Weakness: CWE-923

Description

Improper restriction of communication channel to intended endpoints in Windows PowerShell allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Powershell: from 7.4 before 7.4.12; from 7.5 before 7.5.3 — fixed in 7.4.12, 7.5.3
Microsoft Windows 10 1607: before 10.0.14393.8422 — fixed in 10.0.14393.8422
Microsoft Windows 10: before 10.0.17763.7792 — fixed in 10.0.17763.7792
Microsoft Windows 10: before 10.0.19044.6332 — fixed in 10.0.19044.6332
Microsoft Windows 10: before 10.0.19045.6332 — fixed in 10.0.19045.6332
Microsoft Windows 11: before 10.0.22621.5909 — fixed in 10.0.22621.5909
Microsoft Windows 11: before 10.0.22631.5909 — fixed in 10.0.22631.5909
Microsoft Windows 11: before 10.0.26100.6508 — fixed in 10.0.26100.6508
Microsoft Windows Server 2016: before 10.0.14393.8422 — fixed in 10.0.14393.8422
Microsoft Windows Server 2019: before 10.0.17763.7792 — fixed in 10.0.17763.7792
Microsoft Windows Server 2022: before 10.0.20348.4106 — fixed in 10.0.20348.4106
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1849 — fixed in 10.0.25398.1849
Microsoft Windows Server 2025: before 10.0.26100.6508 — fixed in 10.0.26100.6508
Microsoft PowerShell 7.4: from 7.4.0 before 7.4.12 — fixed in 7.4.12
Microsoft PowerShell 7.5: from 7.5.0 before 7.5.3 — fixed in 7.5.3
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.8422 — fixed in 10.0.14393.8422
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.7792 — fixed in 10.0.17763.7792
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.6332 — fixed in 10.0.19044.6332
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.6332 — fixed in 10.0.19045.6332
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5909 — fixed in 10.0.22621.5909
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.5909 — fixed in 10.0.22631.5909
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.5909 — fixed in 10.0.22631.5909
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.6584 — fixed in 10.0.26100.6584
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8422 — fixed in 10.0.14393.8422
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7792 — fixed in 10.0.17763.7792
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.4171 — fixed in 10.0.20348.4171
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1849 — fixed in 10.0.25398.1849
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.6584 — fixed in 10.0.26100.6584

How to fix

Upgrade to a fixed version: Microsoft Powershell 7.4.12, 7.5.3; Microsoft Windows 10 1607 10.0.14393.8422; Microsoft Windows 10 10.0.17763.7792; Microsoft Windows 10 10.0.19044.6332; Microsoft Windows 10 10.0.19045.6332; Microsoft Windows 11 10.0.22621.5909; Microsoft Windows 11 10.0.22631.5909; Microsoft Windows 11 10.0.26100.6508; Microsoft Windows Server 2016 10.0.14393.8422; Microsoft Windows Server 2019 10.0.17763.7792; Microsoft Windows Server 2022 10.0.20348.4106; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1849. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49734

Get alerted when CVE-2025-49734 or the next vulnerability affects your stack