High severity7.5NVD Advisory· Published Apr 3, 2026· Updated Apr 7, 2026

CVE-2020-37216

Description

Hirschmann HiOS devices versions prior to 08.1.00 and 07.1.01 contain a denial of service vulnerability in the EtherNet/IP stack where improper handling of packet length fields allows remote attackers to crash or hang the device. Attackers can send specially crafted UDP EtherNet/IP packets with a length value larger than the actual packet size to render the device inoperable.

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References

assets.belden.com/m/3d3e2cbfa4860258/original/Belden-Security-Bulletin-BSECV-2019-14.pdfnvd
www.vulncheck.com/advisories/hirschmann-hios-ethernet-ip-stack-denial-of-servicenvd

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