How severe is CVE-2020-28190?

CVE-2020-28190 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-28190 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28190?

CVE-2020-28190 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28190?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-28190 published?

CVE-2020-28190 was published on 2020-12-24 and last updated on 2026-06-17.

CVE-2020-28190

Q: What is CVE-2020-28190?

TerraMaster TOS <= 4.2.06 was found to check for updates (of both system and applications) via an insecure channel (HTTP). Man-in-the-middle attackers are able to intercept these requests and serve a weaponized/infected version of applications or updates.

CVE-2020-28190 is a medium-severity vulnerability in Terra-master Tos with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Terra-master Tos
Published: 2020-12-24
Last modified: 2026-06-17

Description

TerraMaster TOS <= 4.2.06 was found to check for updates (of both system and applications) via an insecure channel (HTTP). Man-in-the-middle attackers are able to intercept these requests and serve a weaponized/infected version of applications or updates.

Frequently asked questions

What is CVE-2020-28190?: TerraMaster TOS <= 4.2.06 was found to check for updates (of both system and applications) via an insecure channel (HTTP). Man-in-the-middle attackers are able to intercept these requests and serve a weaponized/infected version of applications or updates.
How severe is CVE-2020-28190?: CVE-2020-28190 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-28190 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28190?: CVE-2020-28190 affects Terra-master Tos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28190?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28190 published?: CVE-2020-28190 was published on 2020-12-24 and last updated on 2026-06-17.

References

Affected products (1)

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

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