CVE-2017-1000230: SNAP7 Project SNAP7 Server

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

The Snap7 Server version 1.4.1 can be crashed when the ItemCount field of the ReadVar or WriteVar functions of the S7 protocol implementation in Snap7 are provided with unexpected input, thus resulting in denial of service attack.

Affected products

• SNAP7 Project SNAP7 Server: version 1.4.1 only

Published 2017-11-17. Last modified 2026-06-17.