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CVE-2020-28188

INDEX BUILT · 2026-09-20

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Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to inject OS commands via…

CVE-2020-281883 of 4 sources documented this
51

rank 51 = 24 + 25 + 0 + 2 + 0

rank@v1 · this cycle

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.96598  ·  without this subject the record ranks 27

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 9.8, from NVD  ·  without this subject the record ranks 26

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 51

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 49

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 51

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4.82Mover the next 30 days, if this record is yours
Movement+$3.93Mon 2022-02-04, the last material move, 4 years, 4 months before this reading
Basisassumeda published average, not your estate

$4.82M = $4.99M incident cost x 1 exposure x 0.96598 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.96598EPSSNOT IN KEVas of 2026-09-20
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationnone in held sources
Defenseno fix version held
Movementscoring model changedreceipt
PLATEAU10Minimal movement since 2023-03-07, 1196 days at 0.97, as of 2026-06-15. arc-rules@v1

Foresight · where to check next

PHPCVE-2023-43208CVE-2021-27104QNAP Systems Inc.CVE-2019-15107CVE-2019-1605728188

This record is one instance of CWE-78, improper neutralization of special elements used in an os command ('os command injection'). The index holds 6775 prior instances of this class, 121 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classCWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')receipt
Published consequencesCWE-78: Confidentiality, Integrity, Availability, Non-Repudiation: Execute Unauthorized Code or Commands, DoS: Crash, Exit, or Restart, Read Files or Directories, Modify Files or Directories, Read…[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed inNo fix version in held sources, as the index stood on 15 Jun 2026.
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.96598 · top 0.12% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes34 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesTerra-master tosreceipt
Published rangesterra-master tos <= 4.2.06receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

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. receipt

NVD's analysis a second authority

severity
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
weakness
CWE-78
affected versions
terra-master tos <= 4.2.06

check it yourself terra-master.com ihteam.net research.checkpoint.com packetstormsecurity.com receipt

Dated events

2022-02-04EPSS moved 0.08 to 0.862023-03-07EPSS moved 0.86 to 0.97

Movement the material steps

14 Apr 20210.0771
4 Feb 20220.86372 · crossed 0.10 and 0.50
7 Mar 20230.97296 · crossed 0.90 · scoring model v2023.03.01
17 Mar 20250.93178 · scoring model v2025.03.14
15 Jun 20260.96598 · scoring model v2026.06.15
Show all 34 observations
14 Apr 20210.0771
4 Feb 20220.86372
7 Mar 20230.97296
18 Mar 20230.97266
27 Apr 20230.97187
8 May 20230.97205
26 May 20230.97116
12 Jun 20230.97122
22 Jun 20230.97251
8 Jul 20230.97235
19 Jul 20230.97317
31 Jul 20230.97344
27 Aug 20230.97282
9 Sep 20230.97300
23 Sep 20230.97240
16 Nov 20230.97263
30 Nov 20230.97284
13 Dec 20230.97279
27 Mar 20240.97298
11 Apr 20240.97339
28 Apr 20240.97369
13 May 20240.97298
21 Jul 20240.97027
7 Aug 20240.97094
23 Aug 20240.96974
10 Sep 20240.96920
17 Dec 20240.96955
17 Jan 20250.97077
5 Mar 20250.97070
17 Mar 20250.93178
7 Jun 20250.9344
18 Nov 20250.93679
21 Nov 20250.9344
15 Jun 20260.96598

34 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.96598Published2020-12-24Index as of2026-06-15

The record had been public for 5 years, 5 months when this index was last written.

Published 2020-12-24 receipt · Index as of 2026-06-15 derived

The pattern, elsewhere

This record is one instance of CWE-78, improper neutralization of special elements used in an os command ('os command injection'). The index holds 6775 prior instances of this class, 121 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2024-4577 · PHPmatches 8 of 8KEV listed · 2024receipt
CVE-2023-43208matches 8 of 8KEV listed · 2023receipt
CVE-2021-27104matches 8 of 8KEV listed · 2021receipt
CVE-2018-19949 · QNAP Systems Inc. QTSmatches 8 of 8KEV listed · 2020receipt
CVE-2019-15107matches 8 of 8KEV listed · 2019receipt
CVE-2019-16057matches 8 of 8KEV listed · 2019receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

6775 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

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What usually comes next

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