{"id":"CVE-2016-6887","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-6887","generatedAt":"2026-10-28T19:03:03.698Z","title":"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.","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.","published":"2017-01-13T16:59:00.000Z","lastModified":"2026-06-17T00:51:56.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200"],"affected":["matrixssl/matrixssl"],"epss":{"score":0.01147,"percentile":0.66622,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.15%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.matrixssl.org/blog/releases/matrixssl_3_8_4","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://blog.fuzzing-project.org/51-Fun-with-Bignums-Crashing-MatrixSSL-and-more.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.matrixssl.org/blog/releases/matrixssl_3_8_4","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.fuzzing-project.org/51-Fun-with-Bignums-Crashing-MatrixSSL-and-more.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-6887","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}