CVE-2019-3951: Advantech Webaccess

Critical severity, CVSS 9.8. EPSS: 3.6% chance of exploitation in the next 30 days.

Advantech WebAccess before 8.4.3 allows unauthenticated remote attackers to execute arbitrary code or cause a denial of service (memory corruption) due to a stack-based buffer overflow when handling IOCTL 70533 RPC messages.

Affected products

• Advantech Webaccess: before 8.4.3 (fixed in 8.4.3)

Published 2019-12-12. Last modified 2026-06-17.