Local sensitive-data disclosure through kernel logging
Published Feb 10, 2026 · Updated Feb 10, 2026
Sensitive-data logging in the Microsoft Windows Kernel allows local users with low privileges to disclose confidential information from system logs. The kernel writes sensitive information into a log file, but Microsoft has not identified the responsible logging path or exposed data. Exploitation requires local authenticated access and no user interaction; the documented consequence is disclosure without data modification or service interruption.
Summary
What happened
Sensitive-data logging in the Microsoft Windows Kernel allows local users with low privileges to disclose confidential information from system logs. The kernel writes sensitive information into a log file, but Microsoft has not identified the responsible logging path or exposed data. Exploitation requires local authenticated access and no user interaction; the documented consequence is disclosure without data modification or service interruption.
The record
- CVE
- CVE-2026-21222
- Published
- Feb 10, 2026
- Updated
- Feb 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-532, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 10, 2026CVE publishedPublication date reported by the CVE source.
- Feb 10, 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=10.0.17763.0 <10.0.17763.8389
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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