What is the CVSS score of CVE-2025-21315?

CVE-2025-21315 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Windows 11 24h2 are affected by CVE-2025-21315?

CVE-2025-21315 presents notable security risk, a use-after-free vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2025-21315?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Windows 11 24h2 CVE-2025-21315

HIGH

Use After Free (CWE-416)

2025-01-14 secure@microsoft.com

Microsoft Memory Corruption Use After Free Information Disclosure Windows 11 24h2 Windows Server 2022 23h2 Windows Server 2025

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:03 vuln.today

Patch released

Mar 28, 2026 - 18:03 nvd

Patch available

CVE Published

Jan 14, 2025 - 18:15 nvd

HIGH 7.8

DescriptionCVE.org

Microsoft Brokering File System Elevation of Privilege Vulnerability

AnalysisAI

Microsoft Brokering File System Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8). This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.

Technical ContextAI

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Microsoft Brokering File System Elevation of Privilege Vulnerability Affected products include: Microsoft Windows 11 24H2, Microsoft Windows Server 2022 23H2, Microsoft Windows Server 2025.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

CVE-2025-21315 vulnerability details – vuln.today

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Windows 11 24h2 CVE-2025-21315

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code