High MSRC-CVE-2026-50309 1 CVE

Windows NTFS Remote Code Execution Vulnerability

Published Jul 14, 2026 · Updated Aug 13, 2026 · Revision 4

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
10.0.17763.9020 — https://support.microsoft.com/help/5099538
10.0.20348.5386 — https://support.microsoft.com/help/5099540
10.0.19044.7548 — https://support.microsoft.com/help/5099539
10.0.26100.33158 — https://support.microsoft.com/help/5099536
10.0.26200.8875 — https://support.microsoft.com/help/5101650
10.0.28000.2525 — https://support.microsoft.com/help/5101649
10.0.14393.9339 — https://support.microsoft.com/help/5099535
6.2.9200.26226 — https://support.microsoft.com/help/5099445
6.3.9600.23291 — https://support.microsoft.com/help/5099444

Vulnerabilities 1

High 7.8

CVE-2026-50309

Windows NTFS Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

Microsoft Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1809 Windows

Jul 14, 2026

Revision history

2026-08-13 #4
Acknowledgement Updated
2026-08-12 #3
Updated an acknowledgement. This is an informational change only.
2026-08-10 #2
Updated an acknowledgement. This is an informational change only.
2026-07-14 #1
Information published.

References

CVE-2026-50309 Windows NTFS Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50309
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss