Patch tracker / CVE reference / CVE-2024-49138

CVE-2024-49138

CVE-2024-49138 is a high severity Microsoft vulnerability with a CVSS score of 7.8. It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, which makes it a fix-first item. Microsoft has shipped the fix: deploy one of the 16 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

HighCISA KEV

7.8

CVSS

83%

EPSS, 30 days

High

Severity

Yes

Exploited in the wild

Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 83%. CVSS 7.8 (High).

This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability, and one of 1 actively-exploited CVEs in December 2024.

Senserva AI Opinion for CVE-2024-49138

With an 84% EPSS score, this Common Log File System driver escalation is among the most exploitation-likely Windows kernel bugs of its period, Critical at CVSS 9.8 and KEV-listed on 2024-12-10. The driver is present on every Windows 10 1809 and Server 2019 machine.

Do this: Audit December 2024 patch compliance and flag any Windows Server 2019 host still missing it for immediate remediation.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2024-49138

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2024-49138 (source: https://senserva.com/cve/CVE-2024-49138.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2024-49138: High severity Microsoft vulnerability, CVSS 7.8
- EPSS 30-day exploitation probability: 83%
- Actively exploited (CISA KEV): YES
- Fixed by: KB5048652, KB5048653, KB5048654, KB5048661, KB5048667, KB5048671, KB5048676, KB5048685, KB5048695, KB5048699, KB5048703, KB5048710, KB5048735, KB5048744, KB5048794, KB5048800
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch now

Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.

Fixed by KB5048652 and 15 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch now and verify deployment on every exposed device.

Official patch(es) for CVE-2024-49138

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5048652, KB5048653, KB5048654, KB5048661, KB5048667, KB5048671, KB5048676, KB5048685, KB5048695, KB5048699, KB5048703, KB5048710, KB5048735, KB5048744, KB5048794, KB5048800 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2024-49138. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5048652 KB5048653 KB5048654 KB5048661 KB5048667 KB5048671 KB5048676 KB5048685 KB5048695 KB5048699 KB5048703 KB5048710 KB5048735 KB5048744 KB5048794 KB5048800

Scope and sources

Affected products

Fixed by the same updates

CVE-2024-49098 CVE-2024-49099 CVE-2024-49103 CVE-2024-49112 CVE-2024-49080 CVE-2024-49085 CVE-2024-49086 CVE-2024-49093

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC CISA KEV catalog FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.