CVE-2021-20988: Hilscher Rcx Rtos

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

In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.

Affected products

• Hilscher Rcx Rtos: before 2.1.14.1 (fixed in 2.1.14.1)
• Pepperl-Fuchs ICE1-16di-g60l-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-16dio-g60l-c1-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-16dio-g60l-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-8di8do-g60l-c1-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-8di8do-g60l-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-8iol-g30l-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-8iol-g60l-v1d Firmware: up to and including f10017
• Pepperl-Fuchs ICE1-8iol-s2-g60l-v1d Firmware: up to and including f10017

Published 2021-05-13. Last modified 2026-06-17.