Patch tracker / KB5066198
KB5066198: Windows 10 Optional preview update (September 2025)
KB5066198 is a non-security optional preview update for Windows 10, released 2025-09-25, producing OS build 19045.6396. It closes no vulnerabilities, so it carries no Severity rank and appears in no security feed.
Update summary
This is a non-security update: it fixes no vulnerabilities and carries no CVEs, so it has no Severity rank and no CVSS score. It is not in Microsoft's security feed, which is why most vulnerability trackers do not list it at all. Installing it is a reliability and features decision rather than a risk one.
A newer security update for Windows 10 has shipped since this one: KB5091573 (2026-04-19). 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 AI Opinion and rich prompt for KB5066198
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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.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|
Scope and sources
- Affected products
- Also released in September 2025
KB5002775
3 CVEs · HighKB5002778
3 CVEs · HighKB5002784
1 CVE · HighKB5065220
2 CVEs · HighKB5065221
2 CVEs · HighKB5065222
3 CVEs · HighKB5065223
3 CVEs · HighKB5065224
3 CVEs · HighThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.