{"id":"CVE-2018-16870","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-16870","generatedAt":"2026-10-29T00:38:33.863Z","title":"It was found that wolfssl before 3.15.7 is vulnerable to a new variant of the Bleichenbacher attack to perform downgrade attacks against TLS.","description":"It was found that wolfssl before 3.15.7 is vulnerable to a new variant of the Bleichenbacher attack to perform downgrade attacks against TLS. This may lead to leakage of sensible data.","published":"2019-01-03T16:29:00.000Z","lastModified":"2026-06-17T01:44:57.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","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","CWE-310"],"affected":["wolfssl/wolfssl"],"epss":{"score":0.01585,"percentile":0.75453,"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 (1.58%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://cat.eyalro.net/","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://github.com/wolfSSL/wolfssl/pull/1950","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://cat.eyalro.net/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/wolfSSL/wolfssl/pull/1950","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-16870","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."}