CVE-2026-26171: Microsoft .net

High severity, CVSS 7.5. EPSS: 2.3% chance of exploitation in the next 30 days.

Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.

Affected products

• Microsoft .net: from 10.0.0, before 10.0.6 (fixed in 10.0.6); from 8.0.0, before 8.0.26 (fixed in 8.0.26); from 9.0.0, before 9.0.15 (fixed in 9.0.15)
• Microsoft PowerShell: from 7.5, before 7.5.6 (fixed in 7.5.6); from 7.6, before 7.6.1 (fixed in 7.6.1)

Published 2026-04-14. Last modified 2026-07-15.