{"id":"CVE-2026-23570","state":"PUBLISHED","title":"Log timestamp tampering vulnerability in Content Distribution Service","description":"A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.","publishedAt":"2026-01-29T08:50:52.882Z","updatedAt":"2026-01-29T15:45:56.209Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","source":"TV"},"assigner":"TV","products":["TeamViewer DEX"],"affected":[{"vendor":"TeamViewer","product":"DEX","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"26.1","versionType":"custom"}],"modules":["Content Distribution Service","NomadBranch.exe"],"platforms":["Windows"]}],"references":["https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23570.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23570","state":"PUBLISHED","datePublished":"2026-01-29T08:50:52.882Z","dateUpdated":"2026-01-29T15:45:56.209Z","assignerShortName":"TV","assignerOrgId":"13430f76-86eb-43b2-a71c-82c956ef31b6","dateReserved":"2026-01-14T13:54:40.322Z"},"containers":{"cna":{"title":"Log timestamp tampering vulnerability in Content Distribution Service","descriptions":[{"lang":"en","value":"A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation."}],"affected":[{"vendor":"TeamViewer","product":"DEX","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"26.1","versionType":"custom"}],"modules":["Content Distribution Service","NomadBranch.exe"],"platforms":["Windows"]}],"references":[{"url":"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"TV","orgId":"13430f76-86eb-43b2-a71c-82c956ef31b6","dateUpdated":"2026-01-29T08:50:52.882Z"},"credits":[{"lang":"en","type":"finder","value":"Threat Hunt Team of Bank of America"}],"impacts":[{"capecId":"CAPEC-93","descriptions":[{"lang":"en","value":"CAPEC-93 Log Injection-Tampering-Forging"}]}],"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"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-29T15:41:12.827915Z","id":"CVE-2026-23570","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-29T15:45:56.209Z"}}]}}}