EUVD-2026-44048
GHSA-hwpc-v7rx-8pcj
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 14, 2026
Local privilege escalation in the Windows Brokering File System component affects Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025, where a use-after-free memory corruption (CWE-416) lets an already-authenticated local user elevate to higher privileges. Microsoft rates it CVSS 7.8 with full confidentiality, integrity, and availability impact, and has released a patch. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 5 packages in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
DescriptionCVE.org
Use after free in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
Executive ViewAI
Authenticated users on Windows 11 and Windows Server 2025 can exploit a memory flaw to assume administrative control, exposing business systems to data theft and disruption. No public exploit is identified at time of analysis, but the risk is highest for organizations with multi-user systems or contractor access, where any compromised account becomes an entry point for full system takeover. Immediate patching is essential to prevent both insider threats and post-compromise system control.
Begin within 24 hours by inventorying all Windows 11 and Windows Server 2025 systems (specifically versions 24H2, 25H2, 26H1) in your infrastructure. Over the next 7 days, obtain Microsoft's released patch and deploy it to test and non-production systems to validate compatibility with your applications. Complete full deployment to all affected systems within 30 days, prioritizing critical infrastructure such as domain controllers, identity management systems, and administrative workstations.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
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Exploit-DB