Patch tracker / CVE reference / CVE-2026-50492

CVE-2026-50492

CVE-2026-50492 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 6.8 (Medium). Microsoft has shipped the fix: deploy one of the 7 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium
6.8
CVSS v3
4.9%
EPSS, 30 days
Medium
Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.9%. CVSS 6.8 (Medium).

This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2026-50492

CVE-2026-50492 is a remote code execution flaw in the Resilient File System (ReFS) driver on Windows 10 version 1809 and Windows Server 2019. The CVSS 6.8 Medium score and 6.8 vector suggest exploitation likely requires some interaction or specific conditions rather than being trivially remote, and there is no confirmed exploitation or ransomware use yet. It matters because ReFS is commonly used on Server 2019 data volumes and Storage Spaces, so file servers handling that filesystem are the realistic exposure surface.

Do this: Identify any Windows Server 2019 or 1809 hosts using ReFS volumes and prioritize the ReFS RCE patch for those systems in your next patch window.

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-50492

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Schedule normally
No exploitation observed as of 2026-10-14: not in the CISA KEV catalog, EPSS 5%.
Fixed by KB5099535 and 6 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.
Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2026-50492

Lower priority: patch in your normal cycle. In Intune or Defender, confirm whether the fixing updates KB5099535, KB5099536, KB5099538, KB5099539, KB5099540, KB5101649, KB5101650 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2026-50492. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5099535KB5099536KB5099538KB5099539KB5099540KB5101649KB5101650

Scope and sources

Affected products
Fixed by the same updates
CVE-2026-56155CVE-2026-32202CVE-2026-57092CVE-2026-42990CVE-2026-49172CVE-2026-50447CVE-2026-50518CVE-2026-54990
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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