CVE-2026-83899 in Windows

Summary

by MITRE • 10/14/2026

Improper privilege management in Windows Installer allows an authorized attacker to elevate privileges locally.

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• Responsible: Microsoft
• Reservation: 09/01/2026
• Disclosure: 10/14/2026
• Moderation: accepted
• Entry: VDB-419117
• CPE: 20261014
• CWE: CWE-269 (confirmed)
• CVSS: 7.0 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Transportation, Chemical, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-83899
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-83899
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-83899/