What is CVE-2025-21295?

CVE-2025-21295 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

Which CVE IDs does CVE-2025-21295 cover?

CVE-2025-21295 covers the following CVE IDs: CVE-2025-21295. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21295?

CVE-2025-21295 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-21295?

CVE-2025-21295 affects 33 products, including: Windows 10 Version 1607 for 32-bit Systems; Windows 10 Version 1607 for x64-based Systems; Windows 10 Version 1809 for 32-bit Systems; Windows 10 Version 1809 for x64-based Systems; Windows 10 Version 21H2 for 32-bit Systems; and others — see the full list on the advisory page.

CVE-2025-21295CriticalCVSS 8.1

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

January 14, 2025

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2025-21295 →

📋 Description

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to manipulate system operations in a specific manner.

How could an attacker exploit the vulnerability? An attacker who successfully exploits this vulnerability could achieve remote code execution without user interaction.

🎯 Affected products33

Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
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 10 for 32-bit Systems
Windows 10 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 Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
+3 more not shown

✅ Remediation

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 KB5050013 (Security Update) — fixed build 10.0.10240.20890 KB5049993 (Security Update) — fixed build 10.0.14393.7699 KB5050049 (Monthly Rollup) — fixed build 6.1.7601.27520 KB5050006 (Security Only) — fixed build 6.1.7601.27520 KB5050004 (Monthly Rollup) — fixed build 6.2.9200.25273 KB5050048 (Monthly Rollup) — fixed build 6.3.9600.22371

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products33

✅ Remediation

🔗 References (25)