Patch tracker / KB5044273
KB5044273: Windows Server 2019 Security Update (October 2024)
KB5044273 is a High security update for Windows Server 2019, released 2024-10-08. It closes 56 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-2024-43502, which FIRST.org rates at 67% probability of exploitation in the next 30 days.
Update summary
Fixes 56 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.
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.
- |
KB5044273 brings October 2024's fixes to Windows 10 version 1809 and Windows Server 2019, resolving fifty seven CVEs including CVE-2024-43502 and CVE-2024-43537 alongside the CVE-2024-43506 and CVE-2024-43518 issues shared with the Server 2022 packages this month. High severity, CVSS 8.8, a 61 percent EPSS score, and a CISA KEV listing mean the older 1809 and Server 2019 builds share the same active exploitation exposure. Client facing 1809 installs need the same attention as the server only updates above.
Do this: Apply KB5044273 to Windows 10 1809 and Windows Server 2019 systems for October 2024.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5044273
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5044273
- Released
- 2024-10-08
- Last changed
- 2026-08-07
- 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 KB5044273 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5044273 (checked 2026-07-22). Verify against the article before acting.
|
| Symptom
| Workaround
| After installing this update, you might experience a black screen when you login to Azure Virtual Desktop (AVD). You might also notice that you are unable to log out of your account and the black screen persists even after disconnecting and reconnecting to AVD. Resulting from this issue, the application event log in Event viewer will show an application error with Event ID:1000 indicating a fault with the application ‘svchost.exe_AppXSvc'.Please note that AppX Deployment Service (AppxSvc) being in an invalid state could also cause other symptoms like the Start Menu to close unexpectedly due to registration issues.
| This issue is resolved by installing the Windows updates released October 22, 2024 ( KB5045594 ) or later updates and by applying one of the options mentioned in the Resolution section in KB5048864 . Note that you need to perform both actions to resolve the issue.
| After installing this update or later, you might observe that apps such as Quick Assist, Microsoft Teams, Windows Narrator, etc. might fail to start if you are a non-admin user. You might experience this issue on any app that sets UIAccess=true while trying to run the app as a non-admin user. The uiAccess=true attribute in an application's manifest file is used to request that the application be granted higher privileges. Apps using this attribute launch from a secure path, ...
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.
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.