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Vulnerability record · CVE-2021-20093 · published 16 June 2021

CVE-2021-20093: Wibu codemeter out-of-bounds read vulnerability

Wibu · Codemeter

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.

9.1 CVSS 3.1 Critical EPSS 33% · top 1.7% CWE-125 · Out-of-bounds read
9.1CVSS 3.1 base score, v2 6.4
33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf PatchThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02 Third Party AdvisoryUS Government Resource
https://www.tenable.com/security/research/tra-2021-24 ExploitPatchThird Party Advisory
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf PatchThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02 Third Party AdvisoryUS Government Resource
https://www.tenable.com/security/research/tra-2021-24 ExploitPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-20093), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.