Patch tracker / KB5002578

KB5002578

Microsoft security update released 2026-05-12. Fixes 1 CVE.

Medium

Download KB5002578

Get the official update for KB5002578. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5002578 Microsoft support article

Update summary

Released

2026-05-12

CVEs fixed

1

Max CVSS

6.7

Severity

Medium

Exploitation and severity

Fixes 1 CVE. Most severe CVSS 6.7 (Medium). EPSS exploit probability up to <1%.

Among the lower half of tracked Microsoft updates by EPSS exploit probability.

What to do

Lower priority: patch in your normal cycle. Senserva flags whether KB5002578 is missing on your devices.

CVEs fixed by this update

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.

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Lexicon: the terms on this page

CVE: Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB: Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV: CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS: Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS: Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC: Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD: National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware: The vulnerability is linked to known ransomware activity.