What’s Vulnerable › Vulnerabilities

CVE-2025-21315: Microsoft Brokering File System Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-14 · updated 2026-06-17
• Weakness: CWE-416

Description

Microsoft Brokering File System Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 11: before 10.0.26100.2894 — fixed in 10.0.26100.2894
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1369 — fixed in 10.0.25398.1369
• Microsoft Windows Server 2025: before 10.0.26100.2894 — fixed in 10.0.26100.2894
• Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.2894 — fixed in 10.0.26100.2894
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1369 — fixed in 10.0.25398.1369
• Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.2894 — fixed in 10.0.26100.2894

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.26100.2894; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369; Microsoft Windows Server 2025 10.0.26100.2894; Microsoft Windows 11 10.0.26100.2894; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369; Microsoft Windows Server 2025 10.0.26100.2894. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21315

Get alerted when CVE-2025-21315 or the next vulnerability affects your stack