Denial of Service Vulnerability in Hirschmann HiOS Devices
CVE-2020-37216

8.7HIGH

Key Information:

Vendor

Belden

Status
Hirschmann HiOS
Vendor
CVE Published:
3 April 2026

What is CVE-2020-37216?

The vulnerability present in Hirschmann HiOS devices allows remote attackers to exploit the EtherNet/IP stack. By sending specially crafted UDP packets with incorrect length values, attackers can cause the devices to crash or become unresponsive. This vulnerability can significantly disrupt network operations, emphasizing the importance of updating to the latest versions to ensure robust security measures.

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Affected Version(s)

Hirschmann HiOS >= 08.1.00

Hirschmann HiOS 05.00.00 <= 08.0.00

Hirschmann HiOS >= 08.1.00 >= 08.1.00

References

https://assets.belden.com/m/3d3e2cbfa4860258/original/Bel...
vendor-advisory
https://www.vulncheck.com/advisories/hirschmann-hios-ethe...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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