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Status published
High
CVE-2020-37216
Hirschmann HiOS EtherNet/IP Stack Denial of Service
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
Belden
View all reports →Affected Software
Hirschmann HiOS
Vulnerable Versions:
>= 08.1.00, >= 07.1.01, 05.00.00
Timeline
Official Publish:
April 3rd, 2026
Last Modified:
July 15th, 2026
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H