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Vulnerability record · CVE-2020-29189 · published 24 December 2020

CVE-2020-29189: Terra-master tos vulnerability

Terra Master · Tos

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

8.1 CVSS 3.1 High EPSS 1.9% · top 21.3%
8.1CVSS 3.1 base score, v2 5.5
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
9 Jul 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/ ExploitThird Party Advisory
https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-45837Terra-master tos vulnerabilityIt is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by sending a specifically crafted in…EPSS 16%9.8CVE-2021-45840Terra-master tos vulnerabilityIt is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by sending specifically crafted inpu…EPSS 3.9%9.8CVE-2020-15568Terra-master tos improper control of dynamically-managed code vulnerabilityTerraMaster TOS before 4.1.29 has Invalid Parameter Checking that leads to code injection as root. This is a dynamic class method invocation vulnerab…EPSS 29%9.8CVE-2020-28187Terra-master tos path traversal vulnerabilityMultiple directory traversal vulnerabilities in TerraMaster TOS <= 4.2.06 allow remote authenticated attackers to read, edit or delete any file withi…EPSS 16%9.8CVE-2020-28188TerraMaster TOS unauthenticated OS command injection in makecvs.phpTerraMaster TOS 4.2.06 and earlier passes the Event parameter of /include/makecvs.php into OS commands without sanitization, allowing command injecti…EPSS 97%analysed8.8CVE-2021-45836Terra-master tos vulnerabilityAn authenticated attacker can execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by injecting a malicious…EPSS 2.5%8.1CVE-2021-45841Terra-master tos improper authentication vulnerabilityIn Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the us…EPSS 8.4%7.5CVE-2021-45842Terra-master tos vulnerabilityIt is possible to obtain the first administrator's hash set up in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) on the system as well as o…EPSS 2.4%

Source: NIST National Vulnerability Database (record CVE-2020-29189), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.