Patch tracker / KB5082418
KB5082418: Microsoft .NET Framework 4.8 on Window Security Update (April 2026)
KB5082418 is a High security update for Microsoft .NET Framework 4.8 on Window, released 2026-04-14. It closes 3 CVEs with a maximum CVSS of 7.5. It is the 17th largest of the 60 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 3 CVEs. Most severe CVSS 7.5 (High). EPSS exploit probability up to 2.1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
KB5082418 patches three CVEs across .NET 8.0 and .NET 10.0 running on Mac OS and Linux, with the worst rated High Severity at CVSS 7.5, a level consistent with a remote denial of service or availability impact rather than remote code execution. Exposure here is unusual because it spans cross platform .NET workloads on macOS and Linux, not just Windows hosts, so build agents, containers, and Linux backend services are in scope. EPSS tops out at 2 percent and none of the three CVEs are in CISA KEV or linked to ransomware, so this is a plan and patch item rather than an emergency.
Do this: Inventory every .NET 8.0 and .NET 10.0 runtime on your Linux and macOS hosts and schedule the KB5082418 update across those workloads this cycle.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5082418
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5082418
- 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 KB5082418 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-2026-33116 | High | 7.5 | 2.3% | 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.