CVE-2026-83504

Windows SmartScreen Information Disclosure Vulnerability

State: Published
Severity: 4.7 Medium
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Aug 31, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	4.7 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7582Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7582Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.9445Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.9445Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2954Affected

References

Windows SmartScreen Information Disclosure Vulnerabilityvendor-advisorypatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.