Patch tracker / KB5075941
KB5075941: Windows Server 2019 Security Update (February 2026)
KB5075941 is a High security update for Windows Server 2019, released 2026-02-10. It closes 26 CVEs with a maximum CVSS of 8.8. 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-2026-21519, which FIRST.org rates at 26% probability of exploitation in the next 30 days.
Update summary
Fixes 26 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 26%. Among the top 25% 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.
KB5075941 is the February 10, 2026 rollup for Windows 10 version 1809 and Windows Server 2019, closing 26 CVEs with a top Severity of High (CVSS 8.8). One of these flaws is already listed in the CISA Known Exploited Vulnerabilities catalog, though none are currently tied to ransomware, and the highest EPSS score in the set is 26%.
Do this: Deploy KB5075941 to your 1809 and Server 2019 fleet now, prioritizing the CISA KEV-listed CVE since it is confirmed exploited in the wild.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5075941
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5075941
- Released
- 2026-02-10
- Last changed
- 2026-02-10
- Changes tracked
- 1
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 KB5075941 is installed
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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 |
|---|---|---|---|---|
| CVE-2026-21510 | High | 8.8 | 26% | KEV |
| CVE-2026-21513 | High | 8.8 | 26% | KEV |
| CVE-2026-21519 | High | 7.8 | 26% | KEV |
| CVE-2026-21533 | High | 7.8 | 26% | KEV |
| CVE-2026-21525 | Medium | 6.2 | 26% | KEV |
| CVE-2026-21249 | High | 8.8 | 26% | No |
| CVE-2026-21255 | High | 8.8 | 26% | No |
| CVE-2026-21231 | High | 7.8 | 26% | No |
| CVE-2026-21232 | High | 7.8 | 26% | No |
| CVE-2026-21236 | High | 7.8 | 26% | No |
| CVE-2026-21238 | High | 7.8 | 26% | No |
| CVE-2026-21239 | High | 7.8 | 26% | No |
| CVE-2026-21240 | High | 7.8 | 26% | No |
| CVE-2026-21246 | High | 7.8 | 26% | No |
| CVE-2026-20846 | High | 7.5 | 26% | No |
| CVE-2026-21235 | High | 7.3 | 26% | No |
| CVE-2026-21244 | High | 7.3 | 26% | No |
| CVE-2026-21247 | High | 7.3 | 26% | No |
| CVE-2026-21248 | High | 7.3 | 26% | No |
| CVE-2026-21234 | High | 7.0 | 26% | No |
| CVE-2026-21237 | High | 7.0 | 26% | No |
| CVE-2026-21241 | High | 7.0 | 26% | No |
| CVE-2026-21242 | High | 7.0 | 26% | No |
| CVE-2026-21253 | High | 7.0 | 26% | No |
| CVE-2026-21508 | High | 7.0 | 26% | No |
| CVE-2026-21222 | Medium | 5.5 | 26% | No |
Scope and sources
- Affected products
- Also released in February 2026
KB5075897
29 CVEs · High · exploitedKB5075899
29 CVEs · High · exploitedKB5075904
24 CVEs · High · exploitedKB5075906
27 CVEs · High · exploitedKB5075912
24 CVEs · High · exploitedKB5075942
29 CVEs · High · exploitedKB5075943
27 CVEs · High · exploitedKB5075970
15 CVEs · High · 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.