Local information disclosure via TPM out-of-bounds read
Published Jan 13, 2026 · Updated Jan 13, 2026
Out-of-bounds read in the Windows TPM trustlet allows local authenticated users to disclose secrets or privileged application data. Microsoft has not published the affected buffer, function, or operation that reads beyond its allocated boundary. Low-privileged local access is required, and the reported consequence is disclosure without data modification or service interruption.
Summary
What happened
Out-of-bounds read in the Windows TPM trustlet allows local authenticated users to disclose secrets or privileged application data. Microsoft has not published the affected buffer, function, or operation that reads beyond its allocated boundary. Low-privileged local access is required, and the reported consequence is disclosure without data modification or service interruption.
The record
- CVE
- CVE-2026-20829
- Published
- Jan 13, 2026
- Updated
- Jan 13, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 13, 2026CVE publishedPublication date reported by the CVE source.
- Jan 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=10.0.17763.0 <10.0.17763.8276
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.
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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