Patch tracker / KB5046661
KB5046661: Windows Server 2019 Security Update (November 2024)
KB5046661 is a High security update for Windows Server 2019, released 2024-11-12. It closes 19 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-2024-43623, which FIRST.org rates at 82% probability of exploitation in the next 30 days.
Update summary
Fixes 19 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 82%. Among the top 10% 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.
This November 2024 cumulative update for Windows 10 version 1809 and Windows Server 2019 closes out nineteen vulnerabilities, the worst rated High at CVSS 8.8. One of the included flaws is already listed in CISA's Known Exploited Vulnerabilities catalog and carries an 82 percent EPSS score, meaning attackers are very likely to weaponize it if they have not already. Any Server 2019 domain controller or file server still on this build is a live target until the patch lands.
Do this: Deploy KB5046661 to every Windows 10 1809 and Windows Server 2019 host this week, prioritizing internet-facing servers.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5046661
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5046661
- Released
- 2024-11-12
- Last changed
- 2024-11-12
- 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 KB5046661 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-2024-43451 | Medium | 6.5 | 82% | KEV |
| CVE-2024-43620 | High | 8.8 | 82% | No |
| CVE-2024-43621 | High | 8.8 | 82% | No |
| CVE-2024-43622 | High | 8.8 | 82% | No |
| CVE-2024-43627 | High | 8.8 | 82% | No |
| CVE-2024-43628 | High | 8.8 | 82% | No |
| CVE-2024-43635 | High | 8.8 | 82% | No |
| CVE-2024-43623 | High | 7.8 | 82% | No |
| CVE-2024-43626 | High | 7.8 | 82% | No |
| CVE-2024-43641 | High | 7.8 | 82% | No |
| CVE-2024-43644 | High | 7.8 | 82% | No |
| CVE-2024-49019 | High | 7.8 | 82% | No |
| CVE-2024-49046 | High | 7.8 | 82% | No |
| CVE-2024-43452 | High | 7.5 | 82% | No |
| CVE-2024-43634 | Medium | 6.8 | 82% | No |
| CVE-2024-43637 | Medium | 6.8 | 82% | No |
| CVE-2024-43638 | Medium | 6.8 | 82% | No |
| CVE-2024-43643 | Medium | 6.8 | 82% | No |
| CVE-2024-38203 | Medium | 6.2 | 82% | No |
Scope and sources
- Affected products
- Also released in November 2024
KB5046612
27 CVEs · Critical · exploitedKB5046615
31 CVEs · Critical · exploitedKB5046616
37 CVEs · Critical · exploitedKB5046617
33 CVEs · Critical · exploitedKB5046618
35 CVEs · Critical · exploitedKB5046682
22 CVEs · Critical · exploitedKB5046696
36 CVEs · Critical · exploitedKB5046698
37 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.