Patch tracker / KB5048653
KB5048653: Windows Server 2019 Security Update (December 2024)
KB5048653 is a Critical security update for Windows Server 2019, released 2024-12-10. It closes 56 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-2024-49073, which FIRST.org rates at 83% probability of exploitation in the next 30 days.
Update summary
Fixes 56 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.
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.
Microsoft documents 1 known issue with this update.
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This December 10, 2024 package fixes 56 CVEs on Windows 10 Version 1809 and Windows Server 2019, with the same Critical, CVSS 9.8, 84 percent EPSS, confirmed CISA KEV profile as the rest of the month's release. Between the CVE-count variants in this update wave, the differences usually come down to language pack or servicing branch, so confirm the correct one reaches each device.
Do this: Match affected devices to this 56-CVE build rather than assuming a smaller sibling package provides equivalent coverage.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5048653
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5048653
- 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 KB5048653 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5048653 (checked 2026-08-10). Verify against the article before acting.
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| Symptom
| Workaround
| Following the installation of the October 2024 security update, some customers report that the OpenSSH (Open Secure Shell) service fails to start, preventing SSH connections. The service fails with no detailed logging, and manual intervention is required to run the sshd.exe process.This issue is affecting both enterprise, IOT, and education customers, with a limited number of devices impacted. Microsoft is investigating whether consumer customers using Home or Pro editions of Windows are affected.
| This issue is addressed in KB5053599 .
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.
Scope and sources
- Affected products
- Also released in December 2024
KB5048652
46 CVEs · Critical · exploitedKB5048654
41 CVEs · Critical · exploitedKB5048661
55 CVEs · Critical · exploitedKB5048667
57 CVEs · Critical · exploitedKB5048671
32 CVEs · Critical · exploitedKB5048676
24 CVEs · Critical · exploitedKB5048685
46 CVEs · Critical · exploitedKB5048695
24 CVEs · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.