{"id":"CVE-2020-29189","title":"Incorrect Access Control vulnerability in TerraMaster TOS <= 4.2.06 allows remote authenticated attackers to bypass read-only restriction and obtain full access to any folder within the NAS","summary":"Incorrect Access Control vulnerability in TerraMaster TOS <= 4.2.06 allows remote authenticated attackers to bypass read-only restriction and obtain full access to any folder within the NAS","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","vendor":"terra-master","product":"tos","affected":["tos <= 4.2.06"],"published":"2020-12-24","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-29189","references":[{"url":"https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/","label":"cve@mitre.org"},{"url":"http://terramaster.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01888,"epssPercentile":0.78615,"ingestedAt":"2026-07-05T00:59:25.591Z","slug":"CVE-2020-29189","body":"## Overview\n\nIncorrect Access Control vulnerability in TerraMaster TOS <= 4.2.06 allows remote authenticated attackers to bypass read-only restriction and obtain full access to any folder within the NAS\n\n## Affected\n\n- `tos <= 4.2.06`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}