Patch tracker / KB5048744

KB5048744: Windows Server 2019 Security Update (December 2024)

KB5048744 is a Critical security update for Windows Server 2019, released 2024-12-10. It closes 23 CVEs with a maximum CVSS of 9.8. At least one of them is actively exploited (CISA KEV), so this is a deploy-first update. The most likely of them to be attacked is CVE-2024-49084, which FIRST.org rates at 83% probability of exploitation in the next 30 days.

Update summary

CriticalCISA KEV
2024-12-10
Released
23
CVEs fixed
9.8
Max CVSS
Critical
Severity
Deploy now
This update fixes vulnerabilities confirmed exploited in the wild.

Fixes 23 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 83%. Among the top 5% of tracked Microsoft updates by EPSS exploit probability.

Senserva found thiswe track every release for this product line, so we can tell you this package is behind

A newer security update for Windows 10 Version 1809 for 32-bit Systems has shipped since this one: KB5094041 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.

Senserva found thisread these before you deploy broadly

Microsoft documents 1 known issue with this update.

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The full text, quoted from Microsoft

Microsoft Update Catalog: download KB5048744Microsoft support article
Senserva AI Opinion for KB5048744

Another 23-CVE package from the December 10, 2024 cycle, this update targets Windows 10 Version 1809 and Windows Server 2019 with the same Critical, CVSS 9.8, 84 percent EPSS, confirmed CISA KEV profile shared across this month's release. With several similarly sized builds in circulation, tracking by exact KB number is the reliable way to confirm coverage.

Do this: Record this exact KB number in your patch tracking rather than relying on CVE count alone to confirm this build is applied.

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

Senserva AI Opinion and rich prompt for KB5048744

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

Full tracking and change history for KB5048744

Released
2024-12-10
Last changed
2026-07-19
Changes tracked
4

Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.

Check if KB5048744 is installed

Elevated PowerShell. No output means it is not installed.

Known issues, from Microsoft

Quoted from Microsoft's support article for KB5048744 (checked 2026-08-10). Verify against the article before acting.

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| Symptom

| Next step

| After installing this update and restarting your device, you might receive the error, “Failure to configure Windows updates. Reverting Changes. Do not turn off your computer”, and the update might show as Failed in Update History .

| This is expected in the following circumstances:

If you are installing this update on a device that is running an edition that is not supported for ESU. For a complete list of which editions are supported, see KB4497181 .

If you do not have an ESU MAK add-on key installed and activated. If you have an ESU key and have encountered this issue, please verify you have applied all prerequisites and that your key is activated. For information on activation, see the Obtaining Extended Security Updates for eligible Windows devices blog post. For information on the prerequisites, see the How to get this update section of this article.

For the most up-to-date information about known issues for Windows Server 2008 SP2, please go to the Windows release health dashboard .

CVEs fixed by this update

Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.

CVESeverityCVSSEPSSExploited
CVE-2024-49138High7.883%KEV
CVE-2024-49112Critical9.883%No
CVE-2024-49080High8.883%No
CVE-2024-49085High8.883%No
CVE-2024-49086High8.883%No
CVE-2024-49102High8.883%No
CVE-2024-49104High8.883%No
CVE-2024-49125High8.883%No
CVE-2024-49118High8.183%No
CVE-2024-49122High8.183%No
CVE-2024-49124High8.183%No
CVE-2024-49126High8.183%No
CVE-2024-49127High8.183%No
CVE-2024-43583High7.883%No
CVE-2024-49072High7.883%No
CVE-2024-49088High7.883%No
CVE-2024-49090High7.883%No
CVE-2024-49096High7.583%No
CVE-2024-49113High7.583%No
CVE-2024-49121High7.583%No
CVE-2024-49089High7.283%No
CVE-2024-49084High7.083%No
CVE-2024-49082Medium6.883%No

Scope and sources

Affected products
Also released in December 2024

KB5048652

46 CVEs · Critical · exploited

KB5048653

56 CVEs · Critical · exploited

KB5048654

41 CVEs · Critical · exploited

KB5048661

55 CVEs · Critical · exploited

KB5048667

57 CVEs · Critical · exploited

KB5048671

32 CVEs · Critical · exploited

KB5048676

24 CVEs · Critical · exploited

KB5048685

46 CVEs · Critical · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5048744 page (Microsoft Support)Microsoft Update CatalogMicrosoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on 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.
Provided as is, without warranty; verify against the vendor advisory before acting. Data notice and terms.