Patch tracker / KB5046661
KB5046661: Windows Server 2008 Security Update (November 2024)
KB5046661 is a High security update for Windows Server 2008, 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 it is urgent, and Microsoft lists 1 known issue: test it before broad deployment. The most likely of them to be attacked is CVE-2024-43451, which FIRST.org rates at 84% probability of exploitation in the next 30 days.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Update summary
Fixes 19 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 84%. Among the top 5% of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Windows Server 2008 for 32-bit Systems Service Pack 2 has shipped since this one: KB5073697 (2026-01-13). 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.
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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
- 2026-10-21
- Changes tracked
- 4
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
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5046661 (checked 2026-10-10). Microsoft lists 1 known issue. Verify against the article before acting.
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| Symptom
| Next Step
| After installing this update and restarting your device, you might receive the error, “Failure to configure Windows updates. Reverting Changes. Do not turn off your computer”, and the update might show as Failed in Update History .
| This is expected in the following circumstances:
If you are installing this update on a device that is running an edition that is not supported for ESU. For a complete list of which editions are supported, see KB4497181 .
If you do not have an ESU MAK add-on key installed and activated. If you have an ESU key and have encountered this issue, please verify you have applied all prerequisites and that your key is activated. For information on activation, see the Obtaining Extended Security Updates for eligible Windows devices blog post. For information on the prerequisites, see the "How to get this update" section of this article.
For the most up-to-date information about known issues for Windows Server 2008 SP2, please go to the Windows release health dashboard .
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 | 84% | KEV |
| CVE-2024-43620 | High | 8.8 | 1.6% | No |
| CVE-2024-43621 | High | 8.8 | 1.6% | No |
| CVE-2024-43622 | High | 8.8 | 1.6% | No |
| CVE-2024-43627 | High | 8.8 | 1.7% | No |
| CVE-2024-43628 | High | 8.8 | 1.7% | No |
| CVE-2024-43635 | High | 8.8 | 1.7% | No |
| CVE-2024-43623 | High | 7.8 | 4.5% | No |
| CVE-2024-43626 | High | 7.8 | <1% | No |
| CVE-2024-43641 | High | 7.8 | <1% | No |
| CVE-2024-43644 | High | 7.8 | <1% | No |
| CVE-2024-49019 | High | 7.8 | 2.0% | No |
| CVE-2024-49046 | High | 7.8 | <1% | No |
| CVE-2024-43452 | High | 7.5 | 30% | No |
| CVE-2024-43634 | Medium | 6.8 | <1% | No |
| CVE-2024-43637 | Medium | 6.8 | <1% | No |
| CVE-2024-43638 | Medium | 6.8 | <1% | No |
| CVE-2024-43643 | Medium | 6.8 | <1% | No |
| CVE-2024-38203 | Medium | 6.2 | <1% | No |
Scope and sources
- Affected products
- Also released in November 2024
KB5046612
25 CVEs · Critical · exploitedKB5046615
28 CVEs · Critical · exploitedKB5046616
34 CVEs · Critical · exploitedKB5046617
33 CVEs · Critical · exploitedKB5046618
32 CVEs · Critical · exploitedKB5046682
22 CVEs · Critical · exploitedKB5046696
33 CVEs · Critical · exploitedKB5046698
34 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.