{"id":"CVE-2021-40855","aliases":["EUVD-2021-28011"],"status":"published","description":"The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0066,"percentile":0.52057,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2022-01-21T15:33:20Z","modified":"2026-06-17T04:07:32Z","products":[{"vendor":"europa","product":"technical_specifications_for_digital_covid_certificates"}],"references":[{"url":"https://www.consilium.europa.eu/en/policies/coronavirus/eu-digital-covid-certificate/","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://github.com/eu-digital-green-certificates/dgc-overview/security/advisories/GHSA-xcvc-p4fw-qmcj","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]}],"sources":{"cve":[{"id":"CVE-2021-40855","description":"The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.","status":"published","published":"2022-01-21T15:33:20Z","modified":"2024-08-04T02:51:07.416Z","updated_at":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-28011","description":"The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.","status":"published","published":"2022-01-21T15:33:20Z","modified":"2024-08-04T02:51:07Z","updated_at":"2026-11-03T03:24:19.692229Z"}],"nvd":[{"id":"CVE-2021-40855","description":"The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.","status":"published","published":"2022-01-21T16:15:07.877Z","modified":"2026-06-17T04:07:32.73Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:07:03.821385Z"}]}}