{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23567","assignerOrgId":"13430f76-86eb-43b2-a71c-82c956ef31b6","state":"PUBLISHED","assignerShortName":"TV","dateReserved":"2026-01-14T13:54:40.322Z","datePublished":"2026-01-29T08:47:13.169Z","dateUpdated":"2026-01-29T16:44:12.331Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","modules":["Content Distribution Service","NomadBranch.exe"],"platforms":["Windows"],"product":"DEX","vendor":"TeamViewer","versions":[{"lessThan":"26.1","status":"affected","version":"0","versionType":"custom"}]}],"credits":[{"lang":"en","type":"finder","value":"Threat Hunt Team of Bank of America"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets."}],"value":"An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets."}],"impacts":[{"capecId":"CAPEC-100","descriptions":[{"lang":"en","value":"CAPEC-100 Overflow Buffers"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"13430f76-86eb-43b2-a71c-82c956ef31b6","shortName":"TV","dateUpdated":"2026-01-29T08:47:13.169Z"},"references":[{"url":"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Update the TeamViewer DEX Client (1E Client) to the latest available version."}],"value":"Update the TeamViewer DEX Client (1E Client) to the latest available version."}],"source":{"discovery":"UNKNOWN"},"title":"Integer underflow in Content Distribution Service UDP handler","x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-29T15:56:32.513279Z","id":"CVE-2026-23567","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-29T16:44:12.331Z"}}]}}