Hilscher: Denial of Service vulnerability in PROFINET IO Device

published 2021-02-16 5y ago modified 2026-06-17 4mo ago also EUVD-2021-8395

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

A Denial of Service vulnerability was found in Hilscher PROFINET IO Device V3 in versions prior to V3.14.0.7. This may lead to unexpected loss of cyclic communication or interruption of acyclic communication.

Patch / fix

fixed in 1

Hilscher PROFINET IO Device V3.14.0.7

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Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

Hilscher PROFINET IO Device
Pepper+Fuchs PCV/PXV/PGV
Pepper+Fuchs PXV/PGV B28 Profisafe
Pepper+Fuchs OHV
Pepper+Fuchs OIT
Pepper+Fuchs PHA
Pepper+Fuchs WCS

Classification

Weakness

CWE-787 Out-of-bounds Write

References

kb.hilscher.com /display/ISMS/2020-12-03+Denial+of+Service+vulnerability+in+PROFINET+IO+Device
vendor-advisory
cert.vde.com /en-us/advisories/vde-2021-006
third-party-advisory

Sources

CVE List CVE-2021-20986
NVD CVE-2021-20986

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