CVE-2023-28252
KEVRansomware UseMicrosoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability
Description
Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation.
Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HPublishedApr 11, 2023
Last modifiedJun 17, 2026
Added to KEVApr 11, 2023
Remediation dueMay 2, 2023
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-28252PatchVendor Advisory
- packetstormsecurity.com/files/174668/Windows-Common-Log-File-System-Driver-clfs.sys-Privilege-Escalation.htmlExploitThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28252US Government Resource
0 recent articles mention this CVE
84
Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1273 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 48.9% · top 1% of all CVEs
- Weakness
- CWE-122
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.