Local information disclosure via a race condition
Published Oct 13, 2026 · Updated Oct 13, 2026
Information disclosure in Windows SmartScreen on Microsoft Windows 11 allows local users to access information through a race condition. Microsoft identifies a time-of-check time-of-use race but provides no accessible detail about the checked object, intervening change, or disclosed information. Exploitation requires authorized local access; the published assessment identifies no integrity or availability impact.
Summary
What happened
Information disclosure in Windows SmartScreen on Microsoft Windows 11 allows local users to access information through a race condition. Microsoft identifies a time-of-check time-of-use race but provides no accessible detail about the checked object, intervening change, or disclosed information. Exploitation requires authorized local access; the published assessment identifies no integrity or availability impact.
The record
- CVE
- CVE-2026-83504
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Windows 11, version 25H2
- Classifications
- CWE-367
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26200.0 <10.0.26200.9445
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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