CVE-2026-62898: Microsoft .net

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

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)
• Microsoft Visual Studio 2022: from 17.14.0, before 17.14.38 (fixed in 17.14.38)
• Microsoft Visual Studio 2026: from 18.8.0, before 18.8.3 (fixed in 18.8.3)

Published 2026-08-11. Last modified 2026-08-14.