{"cve":"CVE-2021-20093","nvd":{"published":"2021-06-16T12:15:12.037","modified":"2026-06-17T03:33:15.837","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1},"cwes":["CWE-125"],"references":["https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf","https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02","https://www.tenable.com/security/research/tra-2021-24","https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf"],"products":["siemens:pss_cape","siemens:sicam_230_firmware","siemens:simatic_information_server","siemens:simatic_pcs_neo","siemens:simatic_process_historian","siemens:simatic_wincc_oa","siemens:simit_simulation_platform","siemens:sinec_infrastructure_network_services","siemens:sinema_remote_connect_server","wibu:codemeter"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-20093","score":0.33304,"percentile":0.98371,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}