Patch tracker / KB5101014
KB5101014: .NET Framework 3.5 Security Update (July 2026)
KB5101014 is a High security update for .NET Framework 3.5, released 2026-07-14. It closes 11 CVEs with a maximum CVSS of 8.1. It is the 38th largest of the 61 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 11 CVEs. Most severe CVSS 8.1 (High). EPSS exploit probability up to 4.0%. Among the top half of tracked Microsoft updates by EPSS exploit probability.
Microsoft documents 1 known issue with this update.
- Microsoft is not currently aware of any issues in this update.
KB5101014 is a Security Update for .NET Framework 3.5 and 4.8.1 on the newer Windows 11 version 26H1, covering both ARM64 and x64 builds. The per-update CVE detail is still provisional because Microsoft has not published the granular breakdown for this July 2026 cycle, so treat scope as unconfirmed for now. The release document maps no named zero-days here, which lowers the urgency relative to the browser and OS kernel fixes in the same 622 CVE cycle.
Do this: Inventory which of your Windows 11 26H1 ARM64 and x64 machines actually have .NET 3.5 or 4.8.1 installed, then stage KB5101014 to those hosts in a ring rollout.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5101014
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5101014
- Released
- 2026-07-14
- Last changed
- 2026-09-24
- 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 KB5101014 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5101014 (checked 2026-10-06). Verify against the article before acting.
Microsoft is not currently aware of any issues in this update.
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-2026-47304 | High | 8.1 | 4.9% | No |
| CVE-2026-50646 | High | 7.8 | 4.9% | No |
| CVE-2026-50649 | High | 7.8 | 4.9% | No |
| CVE-2026-50650 | High | 7.8 | 4.9% | No |
| CVE-2026-47302 | High | 7.5 | 4.9% | No |
| CVE-2026-50525 | High | 7.5 | 4.9% | No |
| CVE-2026-50527 | High | 7.5 | 4.9% | No |
| CVE-2026-50648 | High | 7.5 | 4.9% | No |
| CVE-2026-50652 | High | 7.5 | 4.9% | No |
| CVE-2026-50653 | High | 7.5 | 4.9% | No |
| CVE-2026-50659 | Medium | 6.5 | 4.9% | No |
Scope and sources
- Affected products
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H1 for x64-based Systems
- Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems
- Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems
- Also released in July 2026
KB5099444
186 CVEs · Critical · exploitedKB5099445
175 CVEs · Critical · exploitedKB5099535
262 CVEs · Critical · exploitedKB5099536
390 CVEs · Critical · exploitedKB5099538
313 CVEs · Critical · exploitedKB5099539
315 CVEs · Critical · exploitedKB5099540
327 CVEs · Critical · exploitedKB5101649
384 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.