CVE-2026-45490: Microsoft .net

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.28 (fixed in 8.0.28); from 9.0.0, before 9.0.17 (fixed in 9.0.17); from 10.0.0, before 10.0.9 (fixed in 10.0.9)

Published 2026-06-09. Last modified 2026-07-23.