Patch tracker / KB5078752
KB5078752: Windows 10 Version 1809 for 32-bit Sys Security Update (March 2026)
KB5078752 is a High security update for Windows 10 Version 1809 for 32-bit Sys, released 2026-03-10. It closes 40 CVEs with a maximum CVSS of 8.8. It is the fourth largest of the 38 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 40 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 4.7%. Among the top half 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: KB5089548 (2026-07-14). 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.
KB5078752 is a large rollup fixing 40 CVEs across Windows 10 versions 1809 and 21H2, with the worst rated High at CVSS 8.8. Nothing here is on the CISA KEV list or ransomware-linked, and exploitation probability stays low at 4% EPSS. The volume matters more than any single flaw: the 8.8 items typically require some user interaction or local access, but 40 patches means broad attack surface reduction in one pass.
Do this: Deploy KB5078752 to your 1809 and 21H2 fleet in the next standard patch cycle, prioritizing internet-facing and multi-user machines.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5078752
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5078752
- Released
- 2026-03-10
- Last changed
- 2026-07-24
- Changes tracked
- 2
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 KB5078752 is installed
Elevated PowerShell. No output means it is not installed.
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.
Scope and sources
- Affected products
- Also released in March 2026
KB5002843
3 CVEs · HighKB5002845
4 CVEs · HighKB5002850
4 CVEs · HighKB5077464
2 CVEs · HighKB5077465
2 CVEs · HighKB5077466
3 CVEs · HighKB5077468
3 CVEs · HighKB5077469
2 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.