{"id":"CVE-2026-4392","state":"PUBLISHED","title":"TeamSpeak 3 Server clientek Handshake assertion","description":"A vulnerability was detected in TeamSpeak 3 Server up to 3.13.7. This issue affects some unknown processing of the component clientek Handshake Handler. Performing a manipulation of the argument proof results in reachable assertion. Remote exploitation of the attack is possible. Upgrading to version 3.13.8 is capable of addressing this issue. Upgrading the affected component is recommended.","publishedAt":"2026-05-27T17:00:09.695Z","updatedAt":"2026-05-28T15:04:08.513Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["n/a TeamSpeak 3 Server"],"affected":[{"vendor":"n/a","product":"TeamSpeak 3 Server","versions":[{"version":"3.13.0","status":"affected"},{"version":"3.13.1","status":"affected"},{"version":"3.13.2","status":"affected"},{"version":"3.13.3","status":"affected"},{"version":"3.13.4","status":"affected"},{"version":"3.13.5","status":"affected"},{"version":"3.13.6","status":"affected"},{"version":"3.13.7","status":"affected"},{"version":"3.13.8","status":"unaffected"}],"cpes":["cpe:2.3:a:teamspeak_3_server:teamspeak_3_server:*:*:*:*:*:*:*:*"],"modules":["clientek Handshake Handler"]}],"references":["https://vuldb.com/vuln/366316","https://vuldb.com/vuln/366316/cti","https://modzero.com/en/advisories/mz-26-01-teamspeak/","https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html","https://www.teamspeak.com/en/downloads/#server"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/4xxx/CVE-2026-4392.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4392","state":"PUBLISHED","datePublished":"2026-05-27T17:00:09.695Z","dateUpdated":"2026-05-28T15:04:08.513Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-03-18T15:06:05.814Z"},"containers":{"cna":{"title":"TeamSpeak 3 Server clientek Handshake assertion","descriptions":[{"lang":"en","value":"A vulnerability was detected in TeamSpeak 3 Server up to 3.13.7. This issue affects some unknown processing of the component clientek Handshake Handler. Performing a manipulation of the argument proof results in reachable assertion. Remote exploitation of the attack is possible. Upgrading to version 3.13.8 is capable of addressing this issue. Upgrading the affected component is recommended."}],"affected":[{"vendor":"n/a","product":"TeamSpeak 3 Server","versions":[{"version":"3.13.0","status":"affected"},{"version":"3.13.1","status":"affected"},{"version":"3.13.2","status":"affected"},{"version":"3.13.3","status":"affected"},{"version":"3.13.4","status":"affected"},{"version":"3.13.5","status":"affected"},{"version":"3.13.6","status":"affected"},{"version":"3.13.7","status":"affected"},{"version":"3.13.8","status":"unaffected"}],"cpes":["cpe:2.3:a:teamspeak_3_server:teamspeak_3_server:*:*:*:*:*:*:*:*"],"modules":["clientek Handshake Handler"]}],"references":[{"url":"https://vuldb.com/vuln/366316","name":"VDB-366316 | TeamSpeak 3 Server clientek Handshake assertion","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/366316/cti","name":"VDB-366316 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://modzero.com/en/advisories/mz-26-01-teamspeak/","tags":["related"]},{"url":"https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html","tags":["related"]},{"url":"https://www.teamspeak.com/en/downloads/#server","tags":["patch"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":5.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":5.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","type":"CWE","lang":"en","description":"Reachable Assertion"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-05-27T17:00:09.695Z"},"timeline":[{"time":"2026-05-27T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-05-27T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-05-27T18:27:22.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Michael Imfeld (modzero)","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-28T15:03:40.600418Z","id":"CVE-2026-4392","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-28T15:04:08.513Z"}}]}}}