KB5055528

Microsoft security update released 2025-04-08. Fixes 68 CVEs.

HighCISA KEVRansomware

Download KB5055528

Get the official update for KB5055528. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5055528 Microsoft support article

Update summary

Released

2025-04-08

CVEs fixed

Max CVSS

8.8

Severity

High

Exploitation and severity

Fixes 68 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 18%. One is linked to ransomware.

Among the top half 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 KB5055528 is missing on your devices.

CVEs fixed by this update

CVE-2022-2601 CVE-2023-40547 CVE-2024-21302 CVE-2025-21191 CVE-2025-21197 CVE-2025-21204 CVE-2025-21205 CVE-2025-21221 CVE-2025-21222 CVE-2025-24058 CVE-2025-24060 CVE-2025-24062 CVE-2025-24073 CVE-2025-24074 CVE-2025-26635 CVE-2025-26637 CVE-2025-26639 CVE-2025-26640 CVE-2025-26641 CVE-2025-26644 CVE-2025-26648 CVE-2025-26649 CVE-2025-26651 CVE-2025-26663 CVE-2025-26665 CVE-2025-26666 CVE-2025-26668 CVE-2025-26669 CVE-2025-26670 CVE-2025-26672 CVE-2025-26673 CVE-2025-26674 CVE-2025-26675 CVE-2025-26678 CVE-2025-26679 CVE-2025-26681 CVE-2025-26686 CVE-2025-26687 CVE-2025-26688 CVE-2025-27469 CVE-2025-27471 CVE-2025-27473 CVE-2025-27475 CVE-2025-27476 CVE-2025-27477 CVE-2025-27478 CVE-2025-27481 CVE-2025-27484 CVE-2025-27487 CVE-2025-27490 CVE-2025-27491 CVE-2025-27492 CVE-2025-27727 CVE-2025-27729 CVE-2025-27730 CVE-2025-27731 CVE-2025-27732 CVE-2025-27735 CVE-2025-27736 CVE-2025-27737 CVE-2025-27738 CVE-2025-27739 CVE-2025-27742 CVE-2025-29809 CVE-2025-29810 CVE-2025-29811 CVE-2025-29812 CVE-2025-29824

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.