How severe is CVE-2020-15568?

CVE-2020-15568 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15568 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15568?

CVE-2020-15568 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15568?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-15568 published?

CVE-2020-15568 was published on 2021-01-30 and last updated on 2026-06-17.

CVE-2020-15568

CVE-2020-15568 is a critical-severity vulnerability in Terra-master Tos with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-913.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-913
Affected product: Terra-master Tos
Published: 2021-01-30
Last modified: 2026-06-17

Description

TerraMaster TOS before 4.1.29 has Invalid Parameter Checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.

Frequently asked questions

What is CVE-2020-15568?: TerraMaster TOS before 4.1.29 has Invalid Parameter Checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.
How severe is CVE-2020-15568?: CVE-2020-15568 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15568 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15568?: CVE-2020-15568 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15568?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-15568 published?: CVE-2020-15568 was published on 2021-01-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:terra-master:tos:*:*:*:*:*:*:*:*

More vulnerabilities in Terra-master Tos

CVE-2021-45840 — Critical (CVSS 9.8): It is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by…
CVE-2021-45837 — Critical (CVSS 9.8): It is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by…
CVE-2020-28188 — Critical (CVSS 9.8): Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to…
CVE-2020-28187 — Critical (CVSS 9.8): Multiple directory traversal vulnerabilities in TerraMaster TOS <= 4.2.06 allow remote authenticated attackers to read,…
CVE-2021-45836 — High (CVSS 8.8): An authenticated attacker can execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X…
CVE-2021-45841 — High (CVSS 8.1): In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the…

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