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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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-03 | Updated 2026-05-14 | Assigner VulnCheck




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-20 Improper Input Validation

Product status

Default status
affected

>= 08.1.00 (custom)
unaffected

>= 07.1.01 (custom)
unaffected

05.00.00 (custom)
affected

References

assets.belden.com/...den-Security-Bulletin-BSECV-2019-14.pdf vendor-advisory

www.vulncheck.com/...ios-ethernet-ip-stack-denial-of-service third-party-advisory

cve.org (CVE-2020-37216)

nvd.nist.gov (CVE-2020-37216)

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