SB20260414146 - Privilege escalation in Microsoft Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys)
Published: April 14, 2026
Security Bulletin ID
SB20260414146
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-27917)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys). A local user can win a race condition and gain elevated privileges on the target system.
Remediation
Install update from vendor's website.