CVE-2021-20987
HIGHCVSS 8.6/10EPSS 1.10%
Last modified
CVE-2021-20987 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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.. EPSS estimates a 1.10% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hilscher | Ethernet\/Ip Adapter Firmware | >= 2.0, < 2.13.0.21 |
| Pepperl-Fuchs | Wcs Firmware | <= 1.2.1 |
| Pepperl-Fuchs | Pxv100-F200-B25-V1d Firmware | <= 1.10.0 |
| Pepperl-Fuchs | Pxv100i-F200-B25-V1d Firmware | <= 1.10.0 |
| Pepperl-Fuchs | Pcv100-F200-B25-V1d-6011-6720 Firmware | <= 1.10.0 |
| Pepperl-Fuchs | Pcv50-F200-B25-V1d Firmware | <= 1.10.0 |
| Pepperl-Fuchs | Pcv80-F200-B25-V1d Firmware | <= 1.10.0 |
| Pepperl-Fuchs | Pcv100-F200-B25-V1d-6011 Firmware | <= 1.10.0 |
References
- https://cert.vde.com/en-us/advisories/vde-2021-007Third Party Advisory
- https://cert.vde.com/en-us/advisories/vde-2021-007Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20987?
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.
How severe is CVE-2021-20987?
CVE-2021-20987 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20987?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-20987?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST