CVE-2019-1214
Published: November 3, 2021
Official Description
Microsoft Windows Common Log File System (CLFS) driver improperly handles objects in memory which can allow for privilege escalation.
CISA KEV Advisory
Microsoft Windows Privilege Common Log File System (CLFS) Escalation Vulnerability
Microsoft Windows Common Log File System (CLFS) driver improperly handles objects in memory which can allow for privilege escalation.
Apply updates per vendor instructions.
Risk Analysis
This privilege escalation vulnerability in the Microsoft Windows Common Log File System (CLFS) driver allows an attacker to gain elevated privileges. While a CVSS score is not available, its HIGH severity and inclusion in CISA's KEV catalog with an EPSS score of 0.03681 indicate a significant risk of exploitation.
This vulnerability is actively being exploited in the wild, as confirmed by its presence in CISA's KEV catalog. The exploit status indicates active exploitation.
Apply the latest security updates for Microsoft Windows to address the CLFS driver vulnerability. Regularly review and restrict user privileges to minimize the impact of privilege escalation attempts.
Technical Analysis
CVE-2019-1214 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-1214 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-1214 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1