High severity7.8NVD Advisory· Published Sep 8, 2026· Updated Sep 8, 2026
CVE-2026-69421
CVE-2026-69421
Description
Integer underflow (wrap or wraparound) in Windows Kernel Mode Driver allows an authorized attacker to elevate privileges locally.
Affected products
1Patches
Vulnerability mechanics
References
1News mentions
1- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026