{"id":"CVE-2026-23567","aliases":["EUVD-2026-4985","GHSA-5c5v-ch87-qh4m"],"status":"published","title":"Integer underflow in Content Distribution Service UDP handler","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00352,"percentile":0.29177,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-01-29T08:47:13Z","modified":"2026-06-17T10:21:47Z","products":[{"vendor":"teamviewer","product":"dex"},{"vendor":"teamviewer","product":"digital_employee_experience"}],"references":[{"url":"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23567"},{"url":"https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001"},{"url":"https://github.com/advisories/GHSA-5c5v-ch87-qh4m"}],"sources":{"cve":[{"id":"CVE-2026-23567","title":"Integer underflow in Content Distribution Service UDP handler","description":"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.","status":"published","published":"2026-01-29T08:47:13.169Z","modified":"2026-01-29T16:44:12.331Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:42:15.603999Z"}],"euvd":[{"id":"EUVD-2026-4985","description":"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.","status":"published","published":"2026-01-29T08:47:13Z","modified":"2026-01-29T16:44:12Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:48:45.944715Z"}],"ghsa":[{"id":"GHSA-5c5v-ch87-qh4m","title":"An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) -...","description":"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.","status":"published","published":"2026-01-29T09:31:50Z","modified":"2026-01-29T09:31:58Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:05:58.473482Z"}],"nvd":[{"id":"CVE-2026-23567","description":"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.","status":"published","published":"2026-01-29T09:16:04.34Z","modified":"2026-06-17T10:21:47.33Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:04.769088Z"}]}}