Patch tracker / KB5046665
KB5046665: Windows Server 2019 Security Update (November 2024)
KB5046665 is a High security update for Windows Server 2019, released 2024-11-12. It closes 23 CVEs with a maximum CVSS of 8.8. At least one of them is actively exploited (CISA KEV) and linked to ransomware, 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 23 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 82%. One is linked to ransomware. 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.
Microsoft documents 1 known issue with this update.
- Microsoft is not currently aware of any issues with this update.
KB5046665 is the November 2024 rollup for Windows 10 version 1809 and Windows Server 2019, fixing 23 CVEs. One of these is on the CISA Known Exploited Vulnerabilities list and is linked to ransomware use, and the batch peaks at High severity (CVSS 8.8) with an EPSS exploit probability of 82 percent. Domain controllers and legacy 1809 endpoints still in service are directly exposed.
Do this: Deploy KB5046665 to all Windows Server 2019 and Windows 10 1809 systems now, prioritizing domain controllers and internet-facing hosts given the KEV-listed, ransomware-linked CVE.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5046665
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5046665
- 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 KB5046665 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5046665 (checked 2026-08-11). Verify against the article before acting.
Microsoft is not currently aware of any issues with this update.
How to get this update
EXPIRATION NOTICE
IMPORTANT As of January 27, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows.
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-2024-49039 | High | 8.8 | 82% | KEV Ransomware |
| 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-2024-43516 | High | 7.8 | 82% | No |
| CVE-2024-43623 | High | 7.8 | 82% | No |
| CVE-2024-43626 | High | 7.8 | 82% | No |
| CVE-2024-43636 | High | 7.8 | 82% | No |
| CVE-2024-43641 | High | 7.8 | 82% | No |
| CVE-2024-43644 | High | 7.8 | 82% | No |
| CVE-2024-49046 | High | 7.8 | 82% | No |
| CVE-2024-43511 | High | 7.0 | 82% | No |
| CVE-2024-43449 | Medium | 6.8 | 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-2024-43645 | Medium | 6.7 | 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.