What is CVE-2020-28400?

CVE-2020-28400 is a high-severity vulnerability in Siemens Development/evaluation Kits For Profinet Io: Dk Standard Ethernet Controller, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-07-13.

How severe is CVE-2020-28400?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Siemens Development/evaluation Kits For Profinet Io: Dk Standard Ethernet Controller

CVE-2020-28400

Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.

Published 2021-07-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.8th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

cert-portal.siemens.com/productcert/pdf/ssa-599968.pdf (Patch, Vendor Advisory)
us-cert.cisa.gov/ics/advisories/icsa-21-194-03 (US Government Resource, Third Party Advisory)
cert-portal.siemens.com/productcert/html/ssa-599968.html

Frequently asked questions

What is CVE-2020-28400?: CVE-2020-28400 is a high-severity vulnerability in Siemens Development/evaluation Kits For Profinet Io: Dk Standard Ethernet Controller, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-07-13.
How severe is CVE-2020-28400?: High severity. CVSS v3 base score is 7.5 out of 10.