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CVE-2026-83504

MediumCVSS 4.7/10Last modified Oct 28, 2026

Description

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

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Windows 11 version 23H2	>= 10.0.22631.0, < 10.0.22631.7582
Microsoft	Windows 11 Version 23H2	>= 10.0.22631.0, < 10.0.22631.7582
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.9445
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.9445
Microsoft	Windows 11 version 26H1	>= 10.0.28000.0, < 10.0.28000.2954

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83504Vendor Advisory

Timeline

Published: Oct 13, 2026
Last modified: Oct 28, 2026
NVD status: Analyzed

Related CVEs from 2026

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CVE-2026-83504: Medium severity, CVSS 4.7 | Vulnix