Patch tracker / KB5044280
KB5044280: Windows 11 version 21H2 Security Update (October 2024)
KB5044280 is a High security update for Windows 11 version 21H2, released 2024-10-08. It closes 61 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-2024-43506, which FIRST.org rates at 67% 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Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date.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 61 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 67%. Among the top 25% of tracked Microsoft updates by EPSS exploit probability.
We checked Microsoft's support article for KB5044280 on 2026-07-22 and it lists no known issues. Read the article before broad deployment; Microsoft adds issues as reports come in, and we re-check on every refresh.
KB5044280 fixes sixty two CVEs for Windows 10 version 1809 and Windows Server 2019 in October 2024, extending its sibling's coverage with CVE-2024-43533 among the shared CVE-2024-43506 and CVE-2024-43537 set. High severity, CVSS 8.8, a 61 percent EPSS score, and CISA KEV listing are unchanged, so the same actively exploited bug applies. Five additional CVEs over its closest sibling make this the somewhat broader option.
Do this: Install KB5044280 where it offers broader coverage than sibling October 2024 packages for Windows 10 1809 and Server 2019.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5044280
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5044280
- Released
- 2024-10-08
- Last changed
- 2026-09-30
- Changes tracked
- 6
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 KB5044280 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-2024-43572 | High | 9.0 | 67% | KEV |
| CVE-2024-43573 | High | 9.0 | 67% | KEV |
| CVE-2024-37976 | Critical | 9.0 | 67% | No |
| CVE-2024-37982 | Critical | 9.0 | 67% | No |
| CVE-2024-37983 | Critical | 9.0 | 67% | No |
| CVE-2024-43520 | Critical | 9.0 | 67% | No |
| CVE-2024-43523 | Critical | 9.0 | 67% | No |
| CVE-2024-43524 | Critical | 9.0 | 67% | No |
| CVE-2024-43525 | Critical | 9.0 | 67% | No |
| CVE-2024-43526 | Critical | 9.0 | 67% | No |
| CVE-2024-43534 | Critical | 9.0 | 67% | No |
| CVE-2024-43536 | Critical | 9.0 | 67% | No |
| CVE-2024-43537 | Critical | 9.0 | 67% | No |
| CVE-2024-43538 | Critical | 9.0 | 67% | No |
| CVE-2024-43540 | Critical | 9.0 | 67% | No |
| CVE-2024-43542 | Critical | 9.0 | 67% | No |
| CVE-2024-43543 | Critical | 9.0 | 67% | No |
| CVE-2024-43546 | Critical | 9.0 | 67% | No |
| CVE-2024-43547 | Critical | 9.0 | 67% | No |
| CVE-2024-43554 | Critical | 9.0 | 67% | No |
| CVE-2024-43555 | Critical | 9.0 | 67% | No |
| CVE-2024-43557 | Critical | 9.0 | 67% | No |
| CVE-2024-43558 | Critical | 9.0 | 67% | No |
| CVE-2024-43559 | Critical | 9.0 | 67% | No |
| CVE-2024-43561 | Critical | 9.0 | 67% | No |
| CVE-2024-43570 | Critical | 9.0 | 67% | No |
| CVE-2024-43585 | Critical | 9.0 | 67% | No |
| CVE-2024-43517 | High | 8.8 | 67% | No |
| CVE-2024-43518 | High | 8.8 | 67% | No |
| CVE-2024-43519 | High | 8.8 | 67% | No |
| CVE-2024-43532 | High | 8.8 | 67% | No |
| CVE-2024-43533 | High | 8.8 | 67% | No |
| CVE-2024-43599 | High | 8.8 | 67% | No |
| CVE-2024-6197 | High | 8.8 | 67% | No |
| CVE-2024-43574 | High | 8.3 | 67% | No |
| CVE-2024-43582 | High | 8.1 | 67% | No |
| CVE-2024-30092 | High | 8.0 | 67% | No |
| CVE-2024-43501 | High | 7.8 | 67% | No |
| CVE-2024-43509 | High | 7.8 | 67% | No |
| CVE-2024-43514 | High | 7.8 | 67% | No |
| CVE-2024-43516 | High | 7.8 | 67% | No |
| CVE-2024-43528 | High | 7.8 | 67% | No |
| CVE-2024-43551 | High | 7.8 | 67% | No |
| CVE-2024-43556 | High | 7.8 | 67% | No |
| CVE-2024-43560 | High | 7.8 | 67% | No |
| CVE-2024-43563 | High | 7.8 | 67% | No |
| CVE-2024-43583 | High | 7.8 | 67% | No |
| CVE-2024-43584 | High | 7.7 | 67% | No |
| CVE-2024-38149 | High | 7.5 | 67% | No |
| CVE-2024-43506 | High | 7.5 | 67% | No |
| CVE-2024-43515 | High | 7.5 | 67% | No |
| CVE-2024-43562 | High | 7.5 | 67% | No |
| CVE-2024-43565 | High | 7.5 | 67% | No |
| CVE-2024-43550 | High | 7.4 | 67% | No |
| CVE-2024-43553 | High | 7.4 | 67% | No |
| CVE-2024-43529 | High | 7.3 | 67% | No |
| CVE-2024-20659 | High | 7.1 | 67% | No |
| CVE-2024-43581 | High | 7.1 | 67% | No |
| CVE-2024-43615 | High | 7.1 | 67% | No |
| CVE-2024-43511 | High | 7.0 | 67% | No |
| CVE-2024-43535 | High | 7.0 | 67% | No |
Scope and sources
- Affected products
- Also released in October 2024
KB29166583
1 CVE · Critical · exploitedKB5044277
77 CVEs · Critical · exploitedKB5044281
65 CVEs · Critical · exploitedKB5044288
83 CVEs · Critical · exploitedKB5044293
56 CVEs · Critical · exploitedKB5044306
32 CVEs · Critical · exploitedKB5044320
32 CVEs · Critical · exploitedKB5044321
36 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.