CVE-2025-21309

HIGH

Published Jan 14, 2025 Modified Jan 24, 2025 CWE-591

Description

Windows Remote Desktop Services Remote Code Execution Vulnerability

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CVSS v3.1 Score

8.1

HIGH

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

Weakness Type (CWE)

CWE-591 CWE-591

Affected Products

Vendor	Product	Versions
microsoft	windows_server_2012	All
microsoft	windows_server_2012	All
microsoft	windows_server_2016	< 10.0.14393.7699
microsoft	windows_server_2019	< 10.0.17763.6775
microsoft	windows_server_2022	< 10.0.20348.3091
microsoft	windows_server_2022_23h2	< 10.0.25398.1369
microsoft	windows_server_2025	< 10.0.26100.2894

References

Advisories & Patches

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21309

Frequently Asked Questions

What is CVE-2025-21309? +

Windows Remote Desktop Services Remote Code Execution Vulnerability It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2025-21309? +

CVE-2025-21309 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-21309? +

CVE-2025-21309 affects products from microsoft, specifically: windows_server_2012, 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-2025-21309? +

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.