Windows Projected File System Filter Driver
CVE-2021-1663 — Windows Projected File System FS Filter Driver Information Disclosure Vulnerability
Executive Summary
None
Overview
5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 4.8
EPSS Score
0.01201
probability of exploitation in the next 30 days
0.64191 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
8 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 2004 for 32-bit Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 2004 for ARM64-based Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 2004 for x64-based Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 20H2 for 32-bit Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 20H2 for ARM64-based Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 20H2 for x64-based Systems | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 2004 (Server Core installation) | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 20H2 (Server Core Installation) | 4598242 (Security Update) |
Important | Information Disclosure | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4598242 |
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
k0shl
References
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