Patch tracker / KB5043138
KB5043138: Windows Server 2019 Security Update (September 2024)
KB5043138 is a High security update for Windows Server 2019, released 2024-09-10. It closes 22 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-2024-38230, which FIRST.org rates at 52% probability of exploitation in the next 30 days.
Update summary
Fixes 22 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 52%. Among the top 25% of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Windows Server 2019 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.
KB5043138 is a leaner September 2024 package for Windows Server 2019 and Windows Server 2022, fixing twenty three CVEs that bring in CVE-2024-38231 and CVE-2024-38239 alongside the recurring CVE-2024-38230 and CVE-2024-38256 issues. High severity, CVSS 8.8, a 52 percent EPSS score, and CISA KEV listing still apply despite the shorter list. New CVE-2024-3823x identifiers here suggest a slightly different fix scope than the larger sibling packages.
Do this: Deploy KB5043138 to pick up the CVE-2024-38231 and CVE-2024-38239 fixes on Windows Server 2019 and 2022.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5043138
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5043138
- Released
- 2024-09-10
- Last changed
- 2026-08-07
- 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 KB5043138 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-2024-43461 | High | 8.8 | 52% | KEV |
| CVE-2024-38014 | High | 7.8 | 52% | KEV |
| CVE-2024-38217 | Medium | 5.4 | 52% | KEV |
| CVE-2024-38260 | High | 8.8 | 52% | No |
| CVE-2024-43455 | High | 8.8 | 52% | No |
| CVE-2024-38240 | High | 8.1 | 52% | No |
| CVE-2024-30073 | High | 7.8 | 52% | No |
| CVE-2024-38245 | High | 7.8 | 52% | No |
| CVE-2024-38247 | High | 7.8 | 52% | No |
| CVE-2024-38249 | High | 7.8 | 52% | No |
| CVE-2024-38250 | High | 7.8 | 52% | No |
| CVE-2024-38236 | High | 7.5 | 52% | No |
| CVE-2024-38263 | High | 7.5 | 52% | No |
| CVE-2024-43467 | High | 7.5 | 52% | No |
| CVE-2024-38239 | High | 7.2 | 52% | No |
| CVE-2024-43454 | High | 7.1 | 52% | No |
| CVE-2024-38230 | Medium | 6.5 | 52% | No |
| CVE-2024-38231 | Medium | 6.5 | 52% | No |
| CVE-2024-38234 | Medium | 6.5 | 52% | No |
| CVE-2024-38258 | Medium | 6.5 | 52% | No |
| CVE-2024-43487 | Medium | 6.5 | 52% | No |
| CVE-2024-38256 | Medium | 5.5 | 52% | No |
Scope and sources
- Affected products
- Also released in September 2024
KB5043083
24 CVEs · Critical · exploitedKB5042880
37 CVEs · High · exploitedKB5042881
37 CVEs · High · exploitedKB5043049
2 CVEs · High · exploitedKB5043050
36 CVEs · High · exploitedKB5043051
37 CVEs · High · exploitedKB5043055
37 CVEs · High · exploitedKB5043064
29 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.