CVE-2021-20987 json
Hilscher: EtherNet/IP stack crash for specific CIP service
published 2021-02-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8396
- cvss
- 8.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
A denial of service and memory corruption vulnerability was found in Hilscher EtherNet/IP Core V2 prior to V2.13.0.21that may lead to code injection through network or make devices crash without recovery.
Patch / fix
- Hilscher EtherNet/IP Core V2 V2.13.0.21
Exploit prediction
1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
- Hilscher EtherNet/IP Core V2
- Pepper+Fuchs PCV/PXV/PGV
- Pepper+Fuchs WCS
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
kb.hilscher.com
/pages/viewpage.action?pageId=108969480
vendor-advisory
-
cert.vde.com
/en-us/advisories/vde-2021-007
third-party-advisory
Sources
- CVE List CVE-2021-20987
- NVD CVE-2021-20987
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