Windows Resilient File System (ReFS)
CVE-2026-50501 — Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
Executive Summary
Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code locally.
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
8 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 11 Version 24H2 for ARM64-based Systems | 5101650 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5101650 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows 11 Version 25H2 for ARM64-based Systems | 5101650 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows 11 Version 25H2 for x64-based Systems | 5101650 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows 11 Version 26H1 for ARM64-based Systems | 5101649 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows 11 version 26H1 for x64-based Systems | 5101649 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows Server 2025 | 5099536 (Security Update) |
Important | Remote Code Execution | Yes |
| Windows Server 2025 (Server Core installation) | 5099536 (Security Update) |
Important | Remote Code Execution | Yes |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5101650 |
Security Update | Yes |
5101649 |
Security Update | Yes |
5099536 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Donghyeon Oh, Jonghoi Kim, Thanatos Tian & wgg & @2st__ with Diffract, pwn2addr, Aobo Wang
References
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