Patch tracker / KB5048671

KB5048671: Windows Server 2016 Security Update (December 2024)

KB5048671 is a Critical security update for Windows Server 2016, released 2024-12-10. It closes 31 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 84% probability of exploitation in the next 30 days.

Update summary

CriticalCISA KEV
2024-12-10
Released
31
CVEs fixed
9.8
Max CVSS v3
Critical
Severity
Deploy now
This update fixes vulnerabilities confirmed exploited in the wild.

Fixes 31 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 84%. Among the top 10% 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 1607 for 32-bit Systems has shipped since this one: KB5126649 (2026-10-13). 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.

  • Microsoft is not currently aware of any issues with this update.

The full text, quoted from Microsoft

Microsoft Update Catalog: download KB5048671Microsoft support article
Senserva AI Opinion for KB5048671

This December 10, 2024 package addresses 32 CVEs on Windows 10 Version 1809 and Windows Server 2019, again peaking at Critical, CVSS 9.8 with 84 percent EPSS and confirmed CISA KEV status. As with the other mid-sized builds in this wave, confirm it is the right match for your image before relying on it as the sole December update.

Do this: Verify this 32-CVE build is paired with any additional required updates for your specific Windows 10 1809 or Server 2019 configuration.

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

Senserva AI Opinion and rich prompt for KB5048671

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

Full tracking and change history for KB5048671

Released
2024-12-10
Last changed
2026-10-10
Changes tracked
12

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.

Senserva Watchevery change we have recorded for this one
What changed, and when

Microsoft revised KB5048671 on 2026-10-10: CVEs fixed 32 to 31.

  • 2026-10-03 CVEs fixed 32 to 31
  • 2026-10-05 CVEs fixed 31 to 32
  • 2026-10-10 CVEs fixed 32 to 31

Recorded by Senserva on the dates shown, from the MSRC release feed. This is what moved and when, which neither the vendor advisory nor NVD publishes.

Check if KB5048671 is installed

Elevated PowerShell. No output means it is not installed.

Known issues, from Microsoft

Quoted from Microsoft's support article for KB5048671 (checked 2026-10-07). Verify against the article before acting.

Microsoft is not currently aware of any issues with this update.

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-2024-49138High7.884%KEV
CVE-2024-49112Critical9.884%No
CVE-2024-49080High8.884%No
CVE-2024-49085High8.884%No
CVE-2024-49086High8.884%No
CVE-2024-49102High8.884%No
CVE-2024-49104High8.884%No
CVE-2024-49125High8.884%No
CVE-2024-49105High8.484%No
CVE-2024-49106High8.184%No
CVE-2024-49108High8.184%No
CVE-2024-49115High8.184%No
CVE-2024-49118High8.184%No
CVE-2024-49119High8.184%No
CVE-2024-49122High8.184%No
CVE-2024-49124High8.184%No
CVE-2024-49126High8.184%No
CVE-2024-49127High8.184%No
CVE-2024-49072High7.884%No
CVE-2024-49079High7.884%No
CVE-2024-49088High7.884%No
CVE-2024-49090High7.884%No
CVE-2024-49096High7.584%No
CVE-2024-49113High7.584%No
CVE-2024-49121High7.584%No
CVE-2024-49129High7.584%No
CVE-2024-49107High7.384%No
CVE-2024-49089High7.284%No
CVE-2024-49091High7.284%No
CVE-2024-49084High7.084%No
CVE-2024-49082Medium6.884%No

Scope and sources

Affected products
Also released in December 2024

KB5048652

45 CVEs · Critical · exploited

KB5048653

55 CVEs · Critical · exploited

KB5048654

40 CVEs · Critical · exploited

KB5048661

54 CVEs · Critical · exploited

KB5048667

56 CVEs · Critical · exploited

KB5048676

23 CVEs · Critical · exploited

KB5048685

45 CVEs · Critical · exploited

KB5048695

23 CVEs · Critical · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5048671 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.
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