CVE-2021-20094
HIGHCVSS 7.5/10EPSS 4.67%
Last modified
CVE-2021-20094 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to crash the CodeMeter Runtime Server.. EPSS estimates a 4.67% chance of exploitation in the next 30 days.
Description
A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to crash the CodeMeter Runtime Server.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wibu | Codemeter | < 7.21a |
| Siemens | Pss Cape | All versions |
| Siemens | Sicam 230 Firmware | All versions |
References
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdfMitigation, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02Third Party Advisory, US Government Resource
- https://www.tenable.com/security/research/tra-2021-24Exploit, Patch, Third Party Advisory
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdfMitigation, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02Third Party Advisory, US Government Resource
- https://www.tenable.com/security/research/tra-2021-24Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20094?
A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to crash the CodeMeter Runtime Server.
How severe is CVE-2021-20094?
CVE-2021-20094 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.67% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20094?
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-2021-20094?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST