Patch tracker / KB5058383
KB5058383: Windows Server 2019 Security Update (August 2025)
KB5058383 is a High security update for Windows Server 2019, released 2025-08-12. It closes 39 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-2025-55229, which FIRST.org rates at 61% probability of exploitation in the next 30 days.
Update summary
Fixes 39 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 24%. 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: 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.
KB5058383 is the August 12, 2025 rollup for Windows 10 version 1809 and Windows Server 2019, fixing 39 CVEs topping out at High severity (CVSS 8.8). One of these CVEs is on the CISA KEV list of confirmed exploited flaws, though none are tied to known ransomware, and the highest EPSS score of 21% signals meaningful near-term exploitation likelihood. Server 2019 domain controllers and any remaining 1809 endpoints are directly exposed.
Do this: Deploy KB5058383 to all Windows Server 2019 and Windows 10 1809 systems now, prioritizing internet-facing servers and the KEV-listed CVE.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5058383
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5058383
- Released
- 2025-08-12
- Last changed
- 2026-08-03
- Changes tracked
- 3
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 KB5058383 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 August 2025
KB5058379
36 CVEs · High · exploitedKB5058384
44 CVEs · High · exploitedKB5058385
42 CVEs · High · exploitedKB5058387
33 CVEs · High · exploitedKB5058392
42 CVEs · High · exploitedKB5058405
38 CVEs · High · exploitedKB5058411
44 CVEs · High · exploitedKB5058500
42 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.