Windows Resilient File System (ReFS)
CVE-2026-70116 — Windows Resilient File System (ReFS) Security Feature Bypass Vulnerability
Executive Summary
Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to bypass a security feature with a physical attack.
Overview
4.2
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Physical
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 3.7
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
10 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 11 Version 24H2 for ARM64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 25H2 for ARM64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 25H2 for x64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 26H1 for ARM64-based Systems | 5127646 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 version 26H1 for x64-based Systems | 5127646 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 26H2 for ARM64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 Version 26H2 for x64-based Systems | 5127648 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2025 | 5126646 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2025 (Server Core installation) | 5126646 (Security Update) |
Important | Security Feature Bypass | Yes |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5127648 |
Security Update | Yes |
5127646 |
Security Update | Yes |
5126646 |
Security Update | Yes |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
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