CVE-2021-34461
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
Vulnerability in Windows Container Isolation FS Filter Driver allows elevation of privilege. An attacker could exploit this flaw to gain higher privileges on the system.
Risk Assessment
Risk of unauthorized user gaining control over the system.
Recommendation
Install the latest Windows security updates.
Other vulnerabilities in Windows Container Isolation FS Filter Driver
See all- CVE-2026-72971Medium
Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.
- CVE-2026-62775Medium
Incorrect authorization in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.
- CVE-2026-62772High
Heap-based buffer overflow in the Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
- CVE-2026-50428High
Out-of-bounds read in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.
- CVE-2026-33098High
Use after free in Windows Container Isolation FS Filter Driver allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Windows Container Isolation FS Filter Driver Elevation of Privilege Vulnerability