What is CVE-2026-83504?

CVE-2026-83504 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows SmartScreen Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-83504 cover?

CVE-2026-83504 covers the following CVE IDs: CVE-2026-83504. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-83504?

CVE-2026-83504 has a CVSS v3 base score of 4.7, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-83504?

CVE-2026-83504 affects 8 products, including: Windows 11 Version 23H2 for ARM64-based Systems; Windows 11 Version 23H2 for x64-based Systems; Windows 11 Version 24H2 for ARM64-based Systems; Windows 11 Version 24H2 for x64-based Systems; Windows 11 Version 25H2 for ARM64-based Systems; and others — see the full list on the advisory page.

CVE-2026-83504HighCVSS 4.7

Windows SmartScreen Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-83504 →

📋 Description

Time-of-check time-of-use (toctou) race condition in Windows SmartScreen allows an authorized attacker to disclose information locally.

🎯 Affected products8

Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems

✅ Remediation

KB5124008 (Security Update) — fixed build 10.0.26200.9445 KB5122880 (Security Update) — fixed build 10.0.22631.7582 KB5124008 (Security Update) — fixed build 10.0.26100.9445 KB5124012 (Security Update) — fixed build 10.0.28000.2954

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products8

✅ Remediation

🔗 References (7)