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Windows 11 22h2 EUVDEUVD-2025-20639

| CVE-2025-49677 HIGH
Use After Free (CWE-416)
2025-07-08 secure@microsoft.com
Denial Of Service Use After Free Memory Corruption Microsoft Windows 11 22h2
7.0
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

7
Analysis Updated
Apr 16, 2026 - 06:31 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
10.0.22621.5624
EUVD ID Assigned
Mar 16, 2026 - 04:21 euvd
EUVD-2025-20639
Analysis Generated
Mar 16, 2026 - 04:21 vuln.today
PoC Detected
Jul 15, 2025 - 17:16 vuln.today
Public exploit code
CVE Published
Jul 08, 2025 - 17:15 nvd
HIGH 7.0

DescriptionCVE.org

Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Analysis

Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Technical ContextAI

A use-after-free vulnerability occurs when a program continues to use a pointer after the referenced memory has been freed, leading to undefined behavior. This vulnerability is classified as Use After Free (CWE-416).

RemediationAI

Use memory-safe languages. Implement proper object lifecycle management. Use static and dynamic analysis tools to detect UAF patterns.

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Same weakness CWE-416 – Use After Free

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EUVD-2025-20639 vulnerability details – vuln.today
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