CVE-2017-7935: Phoenix Contact GmbH Mguard Firmware

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A Resource Exhaustion issue was discovered in Phoenix Contact GmbH mGuard firmware versions 8.3.0 to 8.4.2. An attacker may compromise the device's availability by performing multiple initial VPN requests.

Affected products

• Phoenix Contact GmbH Mguard Firmware: version 8.3.0 only; version 8.3.1 only; version 8.3.2 only; version 8.4.0 only; version 8.4.1 only; version 8.4.2 only

Published 2017-05-19. Last modified 2026-06-17.