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Vulnerabilities

Vulnerability · CVE-2020-28185

TerraMaster TOS <= 4.2.06 Unauthenticated User Enumeration

Published Nov 20, 2023 · catalog updated Nov 20, 2023 · TerraMaster

Patch now

CVE-2020-28185 is in the CISA known-exploited catalog. Confirm TerraMaster against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
18.25%
Remediation
Remediation guidance
Affected products
stated tos · vendor TerraMaster tos

User Enumeration vulnerability in TerraMaster TOS <= 4.2.06 allows remote unauthenticated attackers to identify valid users within the system via the username parameter to wizard/initialise.php.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated tos<= 4.2.06
  • vendor TerraMaster tosversion unspecified

How to fix CVE-2020-28185

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-28185 is in the CISA known-exploited catalog. Confirm TerraMaster against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with <= 4.2.06. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 18.25%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 20, 2023 · VulnCheck KEV

    Detected

    User Enumeration vulnerability in TerraMaster TOS <= 4.2.06 allows remote unauthenticated attackers to identify valid users within the system via the username parameter to wizard/initialise.php.

  2. Nov 20, 2023 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2020-28185

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-28185

    30-day exploitation probability 18.3%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2020-28185

    User Enumeration vulnerability in TerraMaster TOS <= 4.2.06 allows remote unauthenticated attackers to identify valid users within the system via the username parameter to wizard/initialise.php.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.