CVE-2021-20986 json
Hilscher: Denial of Service vulnerability in PROFINET IO Device
published 2021-02-16 5 y ago modified 2026-06-17 4 mo 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
Summary
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
- Hilscher PROFINET IO Device V3.14.0.7
Exploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
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
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.