CVE-2019-3954: Advantech Webaccess

Critical severity, CVSS 9.8. EPSS: 3.9% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Advantech WebAccess/SCADA 8.4.0 allows a remote, unauthenticated attacker to execute arbitrary code by sending a crafted IOCTL 81024 RPC call.

Affected products

• Advantech Webaccess: version 8.4.0 only

Published 2019-06-19. Last modified 2026-06-17.