CVE-2026-105509
Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
CVE-2026-105509 is a high vulnerability (CVSS 7.0) in Microsoft Windows 11 Version 26h1, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 10th percentile. No source names a fixed version.
- Severity
- 7.0 HighCVSS 3.1, CVE List
- Exploit chance
- 0.21%EPSS, 10th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-105509- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-416, CWE-362
- Updated
- 2026-11-10
EUVDEUVD-2026-121948
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-121948- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-8v46-7q6r-chj2
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate...
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
- Record
GHSA-8v46-7q6r-chj2- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-362
- Updated
- 2026-11-10
NVD
Use after free in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-105509- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-362, CWE-416
- Updated
- 2026-11-11
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.