How severe is CVE-2021-20094?

CVE-2021-20094 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-20094 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20094?

CVE-2021-20094 primarily affects Wibu Codemeter. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20094?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-20094 published?

CVE-2021-20094 was published on 2021-06-16 and last updated on 2026-06-17.

CVE-2021-20094

CVE-2021-20094 is a high-severity vulnerability in Wibu Codemeter with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Wibu Codemeter
Published: 2021-06-16
Last modified: 2026-06-17

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.

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 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-20094 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20094?: CVE-2021-20094 primarily affects Wibu Codemeter. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20094?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-20094 published?: CVE-2021-20094 was published on 2021-06-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:wibu:codemeter:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:pss_cape:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sicam_230_firmware:-:*:*:*:*:*:*:*

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