CVE-2021-20987
Hilscher: EtherNet/IP stack crash for specific CIP service
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Hilscher: EtherNet/IP stack crash for specific CIP service
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.
- Record
CVE-2021-20987- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2021-8396
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.
- Record
EUVD-2021-8396- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r5x8-6vj6-82q6
A denial of service and memory corruption vulnerability was found in Hilscher EtherNet/IP Core V2...
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.
- Record
GHSA-r5x8-6vj6-82q6- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-20987- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
- hilscher ethernet/ip core v2
- hilscher ethernet\/ip adapter firmware
- pepper+fuchs pcv/pxv/pgv
- pepper+fuchs wcs
- pepperl-fuchs pcv100-f200-b25-v1d-6011-6720 firmware
- pepperl-fuchs pcv100-f200-b25-v1d-6011 firmware
- pepperl-fuchs pcv50-f200-b25-v1d firmware
- pepperl-fuchs pcv80-f200-b25-v1d firmware
- pepperl-fuchs pxv100-f200-b25-v1d firmware
- pepperl-fuchs pxv100i-f200-b25-v1d firmware
- pepperl-fuchs wcs firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20987 is a high vulnerability (CVSS 8.6) in Hilscher Ethernet/ip Core V2, published February 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.14%, the 66th percentile. No source names a fixed version.