The Update BureauKB5066136: Cumulative update for .NET Framework, version 4.8, on Windows 10 1607 and Windows Server 2016, October 2025. Information exposure flaw addressed
In short
The update addresses a flaw that could expose information. It applies to .NET Framework 4.8 on Windows 10, version 1607, and Windows Server 2016.
Does it affect you? Applies to: Devices running Windows 10, version 1607, or Windows Server 2016 with .NET Framework 4.8 installed.
Review notes Additional details from the official release notes (1) Read note
- What changes This update addresses an information disclosure vulnerability in .NET Framework 4.8.
The official sources are linked at the end of the page.
What changes
Improvement 1 change
.NET Framework 4.8
-
This update addresses a flaw that could expose information.1
Addresses CVE-2025-55248, an information disclosure vulnerability.
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2025-10-14
- Classification
- Security Updates
- Type
- Cumulative update
- Restart
- Required
- Replaces
- KB5065749, KB5049614
- Replaced by
- KB5082411
| Version | File version | Channel |
|---|---|---|
| 4.8 | 4.8.4798.0 | General availability |
Security
| Vulnerability | Severity | CVSS |
|---|---|---|
|
.NET, .NET Framework, and Visual Studio Information Disclosure Vulnerability
|
Important | 4.8 |
Downloads (Microsoft Update Catalog)
x64
Windows 10 Enterprise LTSB 2016 / Windows Server 2016
57.4 MB
x86
Windows 10 Enterprise LTSB 2016
33.5 MB
Updated components
2 files changed since the previous update for the same versions.
Sources
Updated
Cited passages from Microsoft's official notes (1)
-
1.
This security update addresses an information disclosure vulnerability detailed in CVE-2025-55248.
support.microsoft.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage · 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 3/5, 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