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CVE-2020-28653

INDEX BUILT · 2026-09-20

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Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager…

CVE-2020-286533 of 4 sources documented this
57

rank 57 = 27 + 25 + 1 + 4 + 0

rank@v1 · this cycle

Someone is already using it

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

EPSS 0.78700  ·  without this subject the record ranks 30

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 32

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-10-08  ·  without this subject the record ranks 56

How much of the world it touches

NVD CPE configurations

2 products in the CPE ranges  ·  without this subject the record ranks 53

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 57

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$3.93Mover the next 30 days, if this record is yours
Movement+$205,000on 2026-03-05, the last material move, 3 months before this reading
Basisassumeda published average, not your estate

$3.93M = $4.99M incident cost x 1 exposure x 0.787 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

0.787EPSSNOT IN KEVas of 2026-09-20
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationpublic proof-of-conceptreceipt
Defenseunaffected versions publishedreceipt
Movementthreshold crossedreceipt
RISING10Risen from 0.01374 to 0.787 across 44 observations. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

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 classNo CWE mapping in held sources.

CISA KEV & Federal Remediation Deadline from the record and CISA

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

First unaffected version, by branchmanageengine opmanager 12.5receipt
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: Proof-of-concept published · 3 public repositories, 2021-07-31.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 3 public repositories2021-07-31receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.787 · top 0.43% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes47 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesZohocorp manageengine opmanagerreceipt
Published rangeszohocorp manageengine opmanager < 12.5; zohocorp manageengine opmanager 12.5receipt

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

Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet. 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
affected versions
zohocorp manageengine opmanager < 12.5; zohocorp manageengine opmanager 12.5

check it yourself manageengine.com manageengine.com packetstormsecurity.com receipt

Dated events

2021-09-21EPSS moved 0.06 to 0.322023-09-22EPSS moved 0.64 to 0.112026-06-15EPSS moved 0.93 to 0.79

Movement the material steps

14 Apr 20210.01374
21 Sep 20210.31602 · crossed 0.10
4 Feb 20220.46456
7 Mar 20230.6382 · crossed 0.50 · scoring model v2023.03.01
22 Sep 20230.10529 · crossed 0.50
7 Feb 20240.62550 · crossed 0.50
17 Mar 20250.8216 · scoring model v2025.03.14
29 Mar 20250.70991
30 Mar 20250.8216
28 Oct 20250.90038 · crossed 0.90
18 Nov 20250.86047 · crossed 0.90
21 Nov 20250.90182 · crossed 0.90
1 Dec 20250.89651 · crossed 0.90
5 Mar 20260.92823 · crossed 0.90
15 Jun 20260.787 · crossed 0.90 · scoring model v2026.06.15
Show all 44 observations
14 Apr 20210.01374
16 Sep 20210.05885
21 Sep 20210.31602
22 Sep 20210.3817
4 Feb 20220.46456
7 Mar 20230.6382
8 Mar 20230.63820
28 Apr 20230.62392
10 Sep 20230.63990
22 Sep 20230.10529
23 Jan 20240.12719
7 Feb 20240.62550
6 Apr 20240.68017
22 Apr 20240.61526
22 May 20240.63712
17 Dec 20240.69662
17 Mar 20250.8216
19 Mar 20250.72391
20 Mar 20250.8216
23 Mar 20250.72391
24 Mar 20250.8216
27 Mar 20250.72391
28 Mar 20250.8216
29 Mar 20250.70991
30 Mar 20250.8216
19 May 20250.80604
27 Jun 20250.81823
18 Jul 20250.81472
22 Aug 20250.7917
7 Oct 20250.79884
8 Oct 20250.87854
17 Oct 20250.89127
28 Oct 20250.90038
29 Oct 20250.90492
3 Nov 20250.90182
18 Nov 20250.86047
19 Nov 20250.86799
21 Nov 20250.90182
1 Dec 20250.89651
2 Dec 20250.88711
5 Mar 20260.92823
2 Apr 20260.92995
5 Jun 20260.93064
15 Jun 20260.787

44 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 0.787Published2021-02-03Public PoC2021-07-31Index as of2026-06-15

The record had been public for 5 years, 4 months when this index was last written.

Published 2021-02-03 receipt · Public PoC 2021-07-31 receipt · Index as of 2026-06-15 derived

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