What is CVE-2025-21330?

CVE-2025-21330 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Remote Desktop Services Denial of Service Vulnerability

Which CVE IDs does CVE-2025-21330 cover?

CVE-2025-21330 covers the following CVE IDs: CVE-2025-21330. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21330?

CVE-2025-21330 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-21330?

CVE-2025-21330 affects 23 products, including: Windows 10 Version 1809 for 32-bit Systems; Windows 10 Version 1809 for x64-based Systems; Windows 10 Version 21H2 for 32-bit Systems; Windows 10 Version 21H2 for ARM64-based Systems; Windows 10 Version 21H2 for x64-based Systems; and others — see the full list on the advisory page.

CVE-2025-21330HighCVSS 7.5

Windows Remote Desktop Services Denial of Service Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

January 14, 2025

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2025-21330 →

📋 Description

According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of availability (A:H). What does that mean for this vulnerability? An attacker can send specially crafted packets which could affect availability of the service and result in Denial of Service (DoS).

🎯 Affected products23

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for x64-based Systems
Windows 11 Version 22H2 for ARM64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5095051 (Security Update) — fixed build 10.0.28000.2269 KB5050008 (Security Update) — fixed build 10.0.17763.6775 KB5049983 (Security Update) — fixed build 10.0.20348.3091 KB5049981 (Security Update) — fixed build 10.0.19044.5371 KB5050021 (Security Update) — fixed build 10.0.22621.4751 KB5049981 (Security Update) — fixed build 10.0.19045.5371 KB5050009 (Security Update) — fixed build 10.0.26100.2894 KB5050021 (Security Update) — fixed build 10.0.22631.4751 KB5049984 (Security Update) — fixed build 10.0.25398.1369

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products23

✅ Remediation

🔗 References (15)