CVE-2026-58641: Microsoft .net

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.30 (fixed in 8.0.30); from 9.0.0, before 9.0.19 (fixed in 9.0.19); from 10.0.0, before 10.0.11 (fixed in 10.0.11)

Published 2026-08-11. Last modified 2026-09-03.