Local privilege escalation via numeric truncation
Published Sep 8, 2026 · Updated Sep 9, 2026
Numeric truncation in Microsoft Windows Spaceport.sys allows local users to elevate privileges on affected Windows systems. Microsoft has not published which Spaceport.sys operation truncates an untrusted numeric value or how the shortened value reaches a privileged action. Exploitation requires authorized local access and results in elevated privileges, while no remote path is reported.
Summary
What happened
Numeric truncation in Microsoft Windows Spaceport.sys allows local users to elevate privileges on affected Windows systems. Microsoft has not published which Spaceport.sys operation truncates an untrusted numeric value or how the shortened value reaches a privileged action. Exploitation requires authorized local access and results in elevated privileges, while no remote path is reported.
The record
- CVE
- CVE-2026-69535
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 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?
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- Affected versionversion=10.0.26100.0 <10.0.26100.33438
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
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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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