CVE-2025-49734

HIGH

Published Sep 9, 2025 Modified Oct 2, 2025 CWE-923

Description

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

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CVSS v3.1 Score

7.0

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-923 CWE-923

Affected Products

Vendor	Product	Versions
microsoft	powershell	7.4 — 7.4.12
microsoft	powershell	7.5 — 7.5.3
microsoft	windows_10_1607	< 10.0.14393.8422
microsoft	windows_10_1607	< 10.0.14393.8422
microsoft	windows_10_1809	< 10.0.17763.7792
microsoft	windows_10_1809	< 10.0.17763.7792
microsoft	windows_10_21h2	< 10.0.19044.6332
microsoft	windows_10_22h2	< 10.0.19045.6332
microsoft	windows_11_22h2	< 10.0.22621.5909
microsoft	windows_11_23h2	< 10.0.22631.5909
microsoft	windows_11_24h2	< 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	< 10.0.25398.1849
microsoft	windows_server_2025	< 10.0.26100.6508

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-49734? +

Improper restriction of communication channel to intended endpoints in Windows PowerShell allows an authorized attacker to elevate privileges locally. It has a CVSS v3.1 base score of 7.0 (HIGH).

How severe is CVE-2025-49734? +

CVE-2025-49734 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-49734? +

CVE-2025-49734 affects products from microsoft, specifically: powershell, windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_22h2, windows_11_23h2, windows_11_24h2, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2022_23h2, windows_server_2025. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-49734? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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