Patch tracker / KB5040437
KB5040437: Windows Server 2019 Security Update (August 2024)
KB5040437 is a High security update for Windows Server 2019, released 2024-08-13. It closes 5 CVEs with a maximum CVSS of 7.8. It is the 19th largest of the 49 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 5 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to 1.2%. Among the lower 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: KB5122871 (2026-09-08). 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.
KB5040437 is a related August 2024 update for Windows 10 1809 and Windows Server 2019 that fixes five of the six CVEs covered by its sibling KBs, still High severity at CVSS 7.8. The overlap with other August KBs for the same platforms means some systems may need more than one of these updates to be fully current. Neither KEV listing nor ransomware activity is noted for any of the five CVEs at this time.
Do this: Check which of the August 2024 Windows 10 1809/Server 2019 KBs, including KB5040437, apply to each machine and install all that are relevant.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5040437
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5040437
- Released
- 2024-08-13
- Last changed
- 2026-07-12
- 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 KB5040437 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.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2024-38184 | High | 7.8 | 1.2% | No |
| CVE-2024-38185 | High | 7.8 | 1.2% | No |
| CVE-2024-38186 | High | 7.8 | 1.2% | No |
| CVE-2024-38187 | High | 7.8 | 1.2% | No |
| CVE-2024-38191 | High | 7.8 | 1.2% | No |
Scope and sources
- Affected products
- Also released in August 2024
KB5041160
47 CVEs · Critical · exploitedKB5041571
44 CVEs · Critical · exploitedKB5041573
48 CVEs · Critical · exploitedKB5041578
44 CVEs · Critical · exploitedKB5041580
43 CVEs · Critical · exploitedKB5041585
43 CVEs · Critical · exploitedKB5041592
43 CVEs · Critical · exploitedKB5041773
43 CVEs · Critical · 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.