What is CVE-2026-50357?

CVE-2026-50357 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, classified under CWE-197. CVSS score: 7.8/10. Published 2026-07-14.

How severe is CVE-2026-50357?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Windows 10 Version 1607

CVE-2026-50357

Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
Microsoft Windows Server 2016 — versions 10.0.14393.0
Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
Microsoft Windows Server 2019 — versions 10.0.17763.0

Weakness classification (CWE)

CWE-197

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-50357?: CVE-2026-50357 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, classified under CWE-197. CVSS score: 7.8/10. Published 2026-07-14.
How severe is CVE-2026-50357?: High severity. CVSS v3 base score is 7.8 out of 10.