{"id":"CVE-2021-20093","aliases":["EUVD-2021-7550","GHSA-m5xx-rgqg-j2m6"],"status":"published","title":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An...","description":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.33304,"percentile":0.98394,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2021-06-16T11:09:02Z","modified":"2026-06-17T03:33:15Z","products":[{"vendor":"siemens","product":"pss_cape"},{"vendor":"siemens","product":"sicam_230_firmware"},{"vendor":"siemens","product":"simatic_information_server"},{"vendor":"siemens","product":"simatic_pcs_neo"},{"vendor":"siemens","product":"simatic_process_historian"},{"vendor":"siemens","product":"simatic_wincc_oa"},{"vendor":"siemens","product":"simit_simulation_platform"},{"vendor":"siemens","product":"sinec_infrastructure_network_services"},{"vendor":"siemens","product":"sinema_remote_connect_server"},{"vendor":"wibu","product":"codemeter"},{"vendor":"wibu-systems","product":"wibu-systems codemeter"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2021-24","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory"]},{"url":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20093"},{"url":"https://github.com/advisories/GHSA-m5xx-rgqg-j2m6"}],"sources":{"cve":[{"id":"CVE-2021-20093","description":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.","status":"published","published":"2021-06-16T11:09:02Z","modified":"2024-08-03T17:30:07.515Z","updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2021-7550","description":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.","status":"published","published":"2021-06-16T11:09:02Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.841069Z"}],"ghsa":[{"id":"GHSA-m5xx-rgqg-j2m6","title":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An...","description":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.","status":"published","published":"2022-05-24T19:05:31Z","modified":"2023-01-27T05:07:14Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:43:05.020647Z"}],"nvd":[{"id":"CVE-2021-20093","description":"A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions \u003c 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.","status":"published","published":"2021-06-16T12:15:12.037Z","modified":"2026-06-17T03:33:15.837Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}