{"id":"CVE-2019-11777","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-11777","generatedAt":"2026-10-29T01:57:39.463Z","title":"This could allow one MQTT server to impersonate another and provide the client library with incorrect information.","description":"In the Eclipse Paho Java client library version 1.2.0, when connecting to an MQTT server using TLS and setting a host name verifier, the result of that verification is not checked. This could allow one MQTT server to impersonate another and provide the client library with incorrect information.","published":"2019-09-11T18:15:11.000Z","lastModified":"2026-06-17T02:13:37.000Z","status":"Modified","sourceIdentifier":"emo@eclipse.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-346","CWE-755"],"affected":["eclipse/paho java client"],"epss":{"score":0.00801,"percentile":0.56434,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=549934","tags":["Issue Tracking","Vendor Advisory"],"source":"emo@eclipse.org"},{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=549934","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-11777","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."}