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Fencer Vulns
high 7.8

CVE-2024-49138 kev in the critical feed json

Windows Common Log File System Driver Elevation of Privilege Vulnerability

published 2024-12-10 22 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-43765

cvss
7.8
version 3.1, CNA
cisa kev
Exploited
added 2024-12-10
epss
26.2%
EPSS 26.2% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Patch / fix

cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  • Microsoft Windows 10 Version 1507 10.0.10240.20857
  • Microsoft Windows 10 Version 1607 10.0.14393.7606
  • Microsoft Windows 10 Version 1809 10.0.17763.6659
  • Microsoft Windows 10 Version 21H2 10.0.19044.5247
  • Microsoft Windows 10 Version 22H2 10.0.19045.5247
  • Microsoft Windows 11 version 22H2 10.0.22621.4602
  • Microsoft Windows 11 version 22H3 10.0.22631.4602
  • Microsoft Windows 11 Version 23H2 10.0.22631.4602
  • Microsoft Windows 11 Version 24H2 10.0.26100.2605
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23016
  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27467
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.27467
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23016
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.23016
  • Microsoft Windows Server 2012 6.2.9200.25222
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.25222
  • Microsoft Windows Server 2012 R2 6.3.9600.22318
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.22318
  • Microsoft Windows Server 2016 10.0.14393.7606
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.7606
  • Microsoft Windows Server 2019 10.0.17763.6659
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.6659
  • Microsoft Windows Server 2022 10.0.20348.2966
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1308
  • Microsoft Windows Server 2025 10.0.26100.2605
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.2605

Timeline

  1. 0-day patched (Project Zero)
  2. Added to CISA KEV
  3. Published
  4. CISA SSVC: exploitation active
  5. CISA patch deadline
  6. First public exploit (EDB-52270)

Known exploited

Added
22 mo ago
Patch by
2024-12-31 (22 mo ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
Microsoft, Windows
CISA name
Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2024-12-10
Details
project zero tracker

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
22 mo ago

Exploit prediction

26.21% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52270 Microsoft Windows 11 23h2 - CLFS.sys Elevation of Privilege local, 2025-04-22
  • packetstorm.news https://packetstorm.news/files/id/190585/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 22H2
  • Microsoft Windows 11 version 22H3
  • Microsoft Windows 11 Version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 R2 Service Pack 1
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

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.