CVE-2020-0634 json
An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory,…
published 2020-01-14 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2128
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory, aka 'Windows Common Log File System Driver Elevation of Privilege Vulnerability'.
Patch / fix
Exploit prediction
1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Windows
- Microsoft Windows Server
- Microsoft Windows 10 Version 1903 for 32-bit Systems
- Microsoft Windows 10 Version 1903 for x64-based Systems
- Microsoft Windows 10 Version 1903 for ARM64-based Systems
- Microsoft Windows Server, version 1903 (Server Core installation)
- Microsoft Windows 10 Version 1909 for 32-bit Systems
- Microsoft Windows 10 Version 1909 for x64-based Systems
- Microsoft Windows 10 Version 1909 for ARM64-based Systems
- Microsoft Windows Server, version 1909 (Server Core installation)
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2020-0634
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-20-125/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2020-0634
- NVD CVE-2020-0634
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.