{"id":"CVE-2016-6887","aliases":["EUVD-2016-7772","GHSA-c35w-7j4x-j365"],"status":"published","title":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular...","description":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01147,"percentile":0.67002,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2017-01-13T16:00:00Z","modified":"2026-06-17T00:51:56Z","products":[{"vendor":"matrixssl","product":"matrixssl"}],"references":[{"url":"http://www.matrixssl.org/blog/releases/matrixssl_3_8_4","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://blog.fuzzing-project.org/51-Fun-with-Bignums-Crashing-MatrixSSL-and-more.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-6887"},{"url":"https://github.com/advisories/GHSA-c35w-7j4x-j365"}],"sources":{"cve":[{"id":"CVE-2016-6887","description":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.","status":"published","published":"2017-01-13T16:00:00Z","modified":"2024-08-06T01:43:38.567Z","updated_at":"2026-11-02T14:33:34.815789Z"}],"euvd":[{"id":"EUVD-2016-7772","description":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.","status":"published","published":"2017-01-13T16:00:00Z","modified":"2024-08-06T01:43:38Z","updated_at":"2026-11-03T02:22:35.048987Z"}],"ghsa":[{"id":"GHSA-c35w-7j4x-j365","title":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular...","description":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.","status":"published","published":"2022-05-17T03:03:37Z","modified":"2023-01-27T05:06:52Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:43:00.384551Z"}],"nvd":[{"id":"CVE-2016-6887","description":"The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.","status":"published","published":"2017-01-13T16:59:00.277Z","modified":"2026-06-17T00:51:56.32Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:03:33.686843Z"}]}}