CVE-2021-20094

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 91.5%
KEV: Not listed

Published

June 16, 2021

Last Modified

November 21, 2024

References (8)

vulnreport@tenablehttps://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdf
vulnreport@tenablehttps://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf
vulnreport@tenablehttps://us-cert.cisa.gov/ics/advisories/icsa-21-210-02
vulnreport@tenablehttps://www.tenable.com/security/research/tra-2021-24
af854a3a-2127-422b-91ae-364da2661108https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdf
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf
af854a3a-2127-422b-91ae-364da2661108https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/research/tra-2021-24

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-125Out-of-bounds Read

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 14:51 UTCEG score recompute
2026-05-26 14:51 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-20094?

CVE-2021-20094 is a high vulnerability published on June 16, 2021. 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.

When was CVE-2021-20094 disclosed?

CVE-2021-20094 was first published in the National Vulnerability Database on June 16, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-20094 actively exploited?

CVE-2021-20094 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-20094?

CVE-2021-20094 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-20094?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-20094, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-20094

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-20094?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)