Patch tracker / KB5082404
KB5082404: Microsoft .NET Framework 4.8 on Window Security Update (April 2026)
KB5082404 is a High security update for Microsoft .NET Framework 4.8 on Window, released 2026-04-14. It closes 2 CVEs with a maximum CVSS of 7.5. It is the 34th largest of the 60 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 2 CVEs. Most severe CVSS 7.5 (High). EPSS exploit probability up to 1.3%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
KB5082404 patches two vulnerabilities (CVE-2026-23666 and CVE-2026-32226) in .NET Framework 4.8 running on the older Windows 10 Version 1607 and Windows Server 2012 platforms. The highest rated flaw is High severity at CVSS 7.5, but exploitation signals are low: EPSS sits at 1 percent and neither CVE is in the CISA KEV catalog or tied to ransomware. The notable point is that these are legacy operating systems, so these hosts are likely long lived servers or specialized endpoints that need deliberate patch scheduling.
Do this: Inventory your Windows Server 2012 and Windows 10 1607 machines running .NET Framework 4.8 and schedule KB5082404 in your next maintenance window.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5082404
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5082404
- Released
- 2026-04-14
- Last changed
- 2026-04-14
- Changes tracked
- 1
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 KB5082404 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-2026-23666 | High | 7.5 | 2.1% | No |
| CVE-2026-32226 | Medium | 5.9 | 2.1% | No |
Scope and sources
- Affected products
- Also released in April 2026
KB5082052
115 CVEs · Critical · exploitedKB5082060
121 CVEs · Critical · exploitedKB5082063
124 CVEs · Critical · exploitedKB5082123
107 CVEs · Critical · exploitedKB5082142
116 CVEs · Critical · exploitedKB5082198
87 CVEs · Critical · exploitedKB5082200
107 CVEs · Critical · exploitedKB5083768
119 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.