KB5073722

Microsoft security update released 2026-01-13. Fixes 54 CVEs.

CriticalCISA KEV

Download KB5073722

Get the official update for KB5073722. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5073722 Microsoft support article

Update summary

Released

2026-01-13

CVEs fixed

Max CVSS

9.8

Severity

Critical

Exploitation and severity

Fixes 54 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 73%.

Among the top 25% of tracked Microsoft updates by EPSS exploit probability.

What to do

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. Senserva flags whether KB5073722 is missing on your devices.

Affected products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019

References

Microsoft support article Microsoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.