{"schemaVersion":3,"id":"CVE-2019-15802","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware hashes and encrypts passwords using a hardcoded cryptographic key in sal_util_str_encrypt() in libsal.so.0.0. The parameters (salt, IV, and key data) are used to encrypt and decrypt all passwords using AES256 in CBC mode. With the parameters known, all previously encrypted passwords can be decrypted. This includes the passwords that are part of configuration backups or otherwise embedded as part of the firmware.","dates":{"published":"2019-11-14T20:16:03.000Z","modified":"2024-08-05T00:56:22.467Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.015,"percentile":0.73901,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.015},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.015,"percentile":0.73901}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.015,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.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