vciy

CVE-2021-44515

INDEX BUILT · 2026-09-20

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Zoho ManageEngine Desktop Central is vulnerable to authentication bypass, leading to remote code execution on the server, as exploited in the wild in…

CVE-2021-445153 of 4 sources documented this
75

rank 75 = 40 + 25 + 0 + 4 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.99871 · CISA KEV listed  ·  without this subject the record ranks 35

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 50

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 75

How much of the world it touches

NVD CPE configurations

2 products in the CPE ranges  ·  without this subject the record ranks 71

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 69

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4.98Mover the next 30 days, if this record is yours
Movement-$2.04Mon 2022-04-01, the last material move, 4 years, 5 months before this reading
Basisassumeda published average, not your estate

$4.98M = $4.99M incident cost x 1 exposure x 0.99871 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

0.99871EPSSKEV · LISTED
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationin the wild · KEVreceipt
Defenseunaffected versions publishedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2023-03-07, 1277 days at 1.00, as of 2026-09-04. 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

Check a version against this record

A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.

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AcceptDeferPatch by…Not affectedMitigated

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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.
Ransomware campaign useUnknown to CISAreceipt

CISA KEV & Federal Remediation Deadline from the record and CISA

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

First unaffected version, by branchmanageengine desktop central 10.1.2127.18; manageengine desktop central 10.1.2137.3receipt
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.
CISA remediation statusoverdue since 2021-12-24receipt
CISA required actionApply updates per vendor instructions.receipt

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2021-12-10.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed2021-12-10receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.99871 · top 0.04% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes55 · last 9 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesZohocorp manageengine desktop centralreceipt
Published rangeszohocorp manageengine desktop central < 10.1.2127.18; zohocorp manageengine desktop central >= 10.1.2128.0 < 10.1.2137.3receipt

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 Desktop Central is vulnerable to authentication bypass, leading to remote code execution on the server, as exploited in the wild in December 2021. For Enterprise builds 10.1.2127.17 and earlier, upgrade to 10.1.2127.18. For Enterprise builds 10.1.2128.0 through 10.1.2137.2, upgrade to 10.1.2137.3. For MSP builds 10.1.2127.17 and earlier, upgrade to 10.1.2127.18. For MSP builds 10.1.2128.0 through 10.1.2137.2, upgrade to 10.1.2137.3. 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 desktop central < 10.1.2127.18; zohocorp manageengine desktop central >= 10.1.2128.0 < 10.1.2137.3
also scored by
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

check it yourself pitstop.manageengine.com manageengine.com cisa.gov receipt

Dated events

2021-12-10Added to CISA KEV2021-12-24CISA remediation due2022-01-06EPSS moved 0.02 to 0.082023-03-07EPSS moved 0.06 to 0.972026-06-15EPSS moved 0.94 to 1.00

Movement the material steps

12 Dec 20210.01828
4 Feb 20220.46456 · crossed 0.10
1 Apr 20220.05634 · crossed 0.10
7 Mar 20230.97342 · crossed 0.10 and 0.50 and 0.90 · scoring model v2023.03.01
17 Mar 20250.94311 · scoring model v2025.03.14
15 Jun 20260.99869 · scoring model v2026.06.15
12 Aug 20260.99871
Show all 44 observations
12 Dec 20210.01828
6 Jan 20220.0771
4 Feb 20220.46456
1 Apr 20220.05634
7 Mar 20230.97342
18 Mar 20230.97344
11 May 20230.97412
24 May 20230.97333
21 Jun 20230.97482
4 Jul 20230.97483
19 Jul 20230.97484
2 Aug 20230.97470
16 Aug 20230.97478
15 Sep 20230.97494
22 Sep 20230.97383
30 Sep 20230.97297
8 Dec 20230.97287
25 Dec 20230.97256
7 Jan 20240.97233
7 Feb 20240.97416
5 Mar 20240.97426
6 Jul 20240.97383
18 Jul 20240.97387
27 Aug 20240.97409
17 Nov 20240.97416
30 Nov 20240.97371
17 Dec 20240.97298
28 Jan 20250.97169
28 Feb 20250.97241
15 Mar 20250.97122
17 Mar 20250.94311
9 Aug 20250.94264
12 Aug 20250.94311
18 Nov 20250.94024
21 Nov 20250.94311
28 Jan 20260.94363
6 Mar 20260.94334
22 Mar 20260.94316
27 Mar 20260.94367
21 Apr 20260.94382
28 May 20260.94347
15 Jun 20260.99869
23 Jun 20260.99867
12 Aug 20260.99871

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 0.99871CISA KEV2021-12-10Published2021-12-12Index as of2026-09-04

The record had been public for 4 years, 8 months when this index was last written.

No material movement in 23 days as of the last ingest this index recorded.

CISA KEV 2021-12-10 receipt · Published 2021-12-12 receipt · Index as of 2026-09-04 derived

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