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CVE-2026-4392

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b4295303d2629997c684a28d0640d1b659b4e3a18ee772872ec3db4b1317d15e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","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","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","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","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","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","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/2/cvssV3_0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:teamspeak_3_server:teamspeak_3_server:*:*:*:*:*:*:*:*"],"modules":["clientek Handshake Handler"],"product":"TeamSpeak 3 Server","vendor":"n/a","versions":[{"status":"affected","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":"unaffected","version":"3.13.8"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","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","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","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","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","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","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/metrics/2/cvssV3_0

CWE assertions

1 source assertion
{"cweId":"CWE-617","description":"Reachable Assertion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://files.teamspeak-services.com/docs/security/TS-SA-2026-001.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/references/3
{"tags":["related"],"url":"https://modzero.com/en/advisories/mz-26-01-teamspeak/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/references/2
{"name":"VDB-366316 | TeamSpeak 3 Server clientek Handshake assertion","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/366316"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/references/0
{"name":"VDB-366316 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/366316/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/references/1
{"tags":["patch"],"url":"https://www.teamspeak.com/en/downloads/#server"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8aaebeb8ae83910d3c0770131dc5319a4b8636ab0046cf0ad45e3ee74b5d8bc7 · sha256:37be861fba5b4b0d… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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