{"id":"CVE-2021-34571","aliases":["EUVD-2021-21221","GHSA-mmrg-jwv9-9h53"],"status":"published","title":"Hard-coded Credentials in Enbra Wireless M-Bus devices","description":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00226,"percentile":0.13417,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-798"],"published":"2021-09-16T12:20:15Z","modified":"2026-06-17T03:56:09Z","products":[{"vendor":"enbra","product":"at-wmbus-16-2"},{"vendor":"enbra","product":"er-am dn 15"},{"vendor":"enbra","product":"ewm"},{"vendor":"enbra","product":"ewm 1.7.29"}],"references":[{"url":"https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34571"},{"url":"https://github.com/advisories/GHSA-mmrg-jwv9-9h53"}],"sources":{"cve":[{"id":"CVE-2021-34571","title":"Hard-coded Credentials in Enbra Wireless M-Bus devices","description":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.","status":"published","published":"2021-09-16T12:20:15.225Z","modified":"2024-09-16T16:13:55.21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21221","description":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.","status":"published","published":"2021-09-16T12:20:15Z","modified":"2024-09-16T16:13:55Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:55:53.554412Z"}],"ghsa":[{"id":"GHSA-mmrg-jwv9-9h53","title":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an...","description":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.","status":"published","published":"2022-05-24T19:14:52Z","modified":"2023-01-30T05:02:08Z","cwes":["CWE-798"],"updated_at":"2026-11-02T14:46:34.16886Z"}],"nvd":[{"id":"CVE-2021-34571","description":"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.","status":"published","published":"2021-09-16T13:15:14.2Z","modified":"2026-06-17T03:56:09.063Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.9,"vector":"AV:A/AC:M/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:06:58.502206Z"}]}}