Vulnerability report

Trusted Third Party Report Confirmed Confidence In CISA KEV

CVE-2024-49138

Windows 10 Version 1507

Microsoft / Windows 10 Version 1507 · affected before 10.0.10240.20857

Watch CVE-2024-49138 Browse KEV feed
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Trusted Third Party Report
EPSS
26.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Affected products include Microsoft / Windows 10 Version 1507 and 26 other products, including affected before 10.0.10240.20857, affected before 10.0.14393.7606, and affected before 10.0.17763.6659.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Microsoft Affected
Windows 10 Version 1507
Before 10.0.10240.20857
Microsoft Affected
Windows 10 Version 1607
Before 10.0.14393.7606
Microsoft Affected
Windows 10 Version 1809
Before 10.0.17763.6659
Microsoft Affected
Windows 10 Version 21H2
Before 10.0.19044.5247
Microsoft Affected
Windows 10 Version 22H2
Before 10.0.19045.5247
Microsoft Affected
Windows 11 version 22H2
Before 10.0.22621.4602
Microsoft Affected
Windows 11 version 22H3
Before 10.0.22631.4602
Microsoft Affected
Windows 11 Version 23H2
Before 10.0.22631.4602
Microsoft Affected
Windows 11 Version 24H2
Before 10.0.26100.2605
Microsoft Affected
Windows Server 2008 Service Pack 2
Before 6.0.6003.23016
Microsoft Affected
Windows Server 2008 R2 Service Pack 1
Before 6.1.7601.27467
Microsoft Affected
Windows Server 2008 R2 Service Pack 1 (Server Core installation)
Before 6.1.7601.27467
Microsoft Affected
Windows Server 2008 Service Pack 2
Before 6.0.6003.23016
Microsoft Affected
Windows Server 2008 Service Pack 2 (Server Core installation)
Before 6.0.6003.23016
Microsoft Affected
Windows Server 2012
Before 6.2.9200.25222
Microsoft Affected
Windows Server 2012 (Server Core installation)
Before 6.2.9200.25222
Microsoft Affected
Windows Server 2012 R2
Before 6.3.9600.22318
Microsoft Affected
Windows Server 2012 R2 (Server Core installation)
Before 6.3.9600.22318
Microsoft Affected
Windows Server 2016
Before 10.0.14393.7606
Microsoft Affected
Windows Server 2016 (Server Core installation)
Before 10.0.14393.7606
Microsoft Affected
Windows Server 2019
Before 10.0.17763.6659
Microsoft Affected
Windows Server 2019 (Server Core installation)
Before 10.0.17763.6659
Microsoft Affected
Windows Server 2022
Before 10.0.20348.2966
Microsoft Affected
Windows Server 2022, 23H2 Edition (Server Core installation)
Before 10.0.25398.1308
Microsoft Affected
Windows Server 2025
Before 10.0.26100.2605
Microsoft Affected
Windows Server 2025 (Server Core installation)
Before 10.0.26100.2605
View vendor advisory (opens in new tab)
Published
10 Dec 2024
Exploitation Attempts Reported
10 Dec 2024
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None

Tags

cisa nessus_scanner windows microsoft

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

CISA

Recorded 10 Dec 2024

A trusted third party reported exploitation attempts.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2024-12-10 00:00 UTC
CVE 2026-06-09 18:50 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/212240 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

26.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Heap-based Buffer Overflow CWE-122

Timeline

From disclosure to observed exploitation attempts

  1. 18:50 UTC

    KEV confirmed by CVE

    Exploitation attempts reported by an external source

  2. 09:25 UTC

    Nessus plugin available

    Scanner coverage available

  3. 17:49 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  5. 20:57 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2024-49138

Sample API response 
{
  "cve_id": "CVE-2024-49138",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.26215,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}