CVE-2020-28188

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 97%
CISA-KEV: Not listedEPSS: 97%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to inject OS commands via /include/makecvs.php in Event parameter.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
87(Track*)
EG Risk 87/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation97% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
99.9%
KEV
Not listed

Published

December 24, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jun 8, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

SSD NAS Storage, TerraMaster NAS of Server – TerraMaster Official Store

https://www.terra-master.com/
generic🟡 PoC Available

TerraMaster TOS Multiple Vulnerabilities - IHTeam Security Blog

https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/
generic

FreakOut – Leveraging Newest Vulnerabilities for creating a Botnet - Check Point Research

https://research.checkpoint.com/2021/freakout-leveraging-newest-vulnerabilities-for-creating-a-botnet/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:52 UTCEG score recompute
  2. 2026-07-22 22:38 UTCEG score recompute
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-15 16:55 UTCEPSS rescore
  6. 2026-07-15 16:55 UTCEPSS rescore
  7. 2026-07-08 15:12 UTCEPSS rescore
  8. 2026-06-28 04:54 UTCEPSS rescore
  9. 2026-06-28 04:54 UTCEPSS rescore
  10. 2026-06-23 21:31 UTCEPSS rescore
  11. 2026-06-23 21:31 UTCEPSS rescore
  12. 2026-06-22 14:23 UTCEPSS rescore
  13. 2026-06-22 14:23 UTCEPSS rescore
  14. 2026-06-19 19:24 UTCEPSS rescore
  15. 2026-06-19 19:23 UTCEPSS rescore
  16. 2026-06-15 17:46 UTCEPSS rescore
  17. 2026-06-12 23:10 UTCEPSS rescore
  18. 2026-06-08 14:15 UTCEPSS rescore
  19. 2026-06-06 13:46 UTCEPSS rescore
  20. 2026-06-06 13:45 UTCEPSS rescore
  21. 2026-06-05 22:45 UTCEPSS rescore
  22. 2026-06-05 22:45 UTCEPSS rescore
  23. 2026-06-02 20:11 UTCEPSS rescore
  24. 2026-06-02 20:11 UTCEPSS rescore
  25. 2026-05-26 23:02 UTCEG score recompute
Show 4 more
  1. 2026-05-26 23:02 UTCGHSA enrichment
  2. 2026-05-26 13:42 UTCEPSS rescore
  3. 2026-05-26 13:42 UTCEPSS rescore
  4. 2026-05-23 23:05 UTCOSV refresh

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/linux/http/terramaster_unauth_rce_cve_2020_35665✓ verified
    First seen Dec 12, 2020

    TerraMaster TOS 4.2.06 or lower - Unauthenticated Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-28188.yaml
    First seen Jan 1, 2020

    TerraMaster TOS - Unauthenticated Remote Command Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-28188?
CVE-2020-28188 is a critical vulnerability published on December 24, 2020. Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to inject OS commands via /include/makecvs.php in Event parameter.
When was CVE-2020-28188 disclosed?
CVE-2020-28188 was first published in the National Vulnerability Database on December 24, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-28188 actively exploited?
CVE-2020-28188 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-28188?
CVE-2020-28188 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-28188?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-28188, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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