Local privilege escalation via undisclosed NTFS over-read
Published Jul 14, 2026 · Updated Jul 14, 2026
Out-of-bounds read in Windows NTFS allows local users with low privileges to elevate privileges on affected Microsoft Windows releases. Microsoft has not disclosed the NTFS code path, malformed input, or bounds-checking error that triggers the over-read. Successful exploitation requires local access and low privileges; it grants higher privileges with no user interaction.
Summary
What happened
Out-of-bounds read in Windows NTFS allows local users with low privileges to elevate privileges on affected Microsoft Windows releases. Microsoft has not disclosed the NTFS code path, malformed input, or bounds-checking error that triggers the over-read. Successful exploitation requires local access and low privileges; it grants higher privileges with no user interaction.
The record
- CVE
- CVE-2026-50422
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-125, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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 <10.0.17763.9020
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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