Patch tracker / CVE reference / CVE-2024-49138

CVE-2024-49138

CVE-2024-49138 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.8 (High). 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 v3
84%
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 84%. 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.

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.

KB5048652KB5048653KB5048654KB5048661KB5048667KB5048671KB5048676KB5048685KB5048695KB5048699KB5048703KB5048710KB5048735KB5048744KB5048794KB5048800

Scope and sources

Affected products
Fixed by the same updates
CVE-2024-49112CVE-2024-49080CVE-2024-49085CVE-2024-49086CVE-2024-49093CVE-2024-49102CVE-2024-49104CVE-2024-49117
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCCISA KEV catalogFIRST.org EPSS

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

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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