Local information disclosure via out-of-bounds read
Published Aug 11, 2026 · Updated Aug 25, 2026
Out-of-bounds read in Windows Win32K across affected Windows releases allows local users to disclose information from kernel memory. Microsoft identifies Win32K as the locus but has not disclosed the affected function, input path, or bounds-check failure that permits the read. Exploitation requires local low-privileged access and no user interaction, and the documented consequence is confidentiality loss without data modification or service interruption.
Summary
What happened
Out-of-bounds read in Windows Win32K across affected Windows releases allows local users to disclose information from kernel memory. Microsoft identifies Win32K as the locus but has not disclosed the affected function, input path, or bounds-check failure that permits the read. Exploitation requires local low-privileged access and no user interaction, and the documented consequence is confidentiality loss without data modification or service interruption.
The record
- CVE
- CVE-2026-62743
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 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 <10.0.17763.9121
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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