The Update BureauKB5065755: Cumulative update for .NET Framework, versions 3.5 and 4.8, on Windows 10 1809 and Windows Server 2019, September 2025. ASP.NET error logging improved; GB18030 certificate updated
The update addresses ASP.NET error events that fail to log properly and a WPF update for the GB18030 certificate and Chinese language changes. It includes no new security improvements.
Does it affect you? Applies to: Devices running Windows 10, version 1809, or Windows Server 2019, with .NET Framework 3.5 or 4.8 installed.
What changes
Fix 1 change
ASP.NET
For: Devices running ASP.NET applications
- Some ASP.NET error events that fail to log properly in the Windows Event log are addressed.1
Improvement 1 change
WPF
For: Devices using WPF
-
The GB18030 certificate update for Chinese language changes is addressed.2
GB18030 is associated with the certificate update mentioned for Chinese language changes.
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2025-09-09
- Classification
- Updates
- Type
- Cumulative update
- Restart
- Required
- Replaces
- KB5062068
- Replaced by
- KB5066137
| Version | File version | Channel |
|---|---|---|
| 3.5 | 2.0.50727.9066 | General availability |
| 4.8 | 4.8.4797.0 | General availability |
Security
No vulnerabilities are listed for this update.
Downloads (Microsoft Update Catalog)
Updated components
50 files changed since the previous update for the same versions.
| Top changed components | Files |
|---|---|
| WPF | 22 |
| ASP.NET | 10 |
Verified in package: changed files confirm ASP.NET, WPF.
Sources
Cited passages from Microsoft's official notes (2)
-
1.
Addressed an issue in ASP.NET where some error events fail to log properly in the Windows Event log.
support.microsoft.com -
2.
Addressed an update for GB18030 certificate for Chinese language changes.
support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Oct 20, 2026
- Quotes found in the official pages: passed
- Numbers found in the sources: passed
- Vulnerabilities from the dossier only: passed
- Links to allowed domains only: passed
- Every official change covered: passed
- Readable plain text: passed
- Changes confirmed by the file list: passed
- Sources agree: passed
A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 5/5. How we work
Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake