vciy

CVE-2021-37415

INDEX BUILT · 2026-09-20

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Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

CVE-2021-374153 of 4 sources documented this
77

rank 77 = 40 + 25 + 1 + 5 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.99825 · CISA KEV listed  ·  without this subject the record ranks 37

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 52

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-12-11  ·  without this subject the record ranks 76

How much of the world it touches

NVD CPE configurations

4 products in the CPE ranges  ·  without this subject the record ranks 72

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 71

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4.98Mover the next 30 days, if this record is yours
Movement+$251,000on 2025-12-11, the last material move, 8 months before this reading
Basisassumeda published average, not your estate

$4.98M = $4.99M incident cost x 1 exposure x 0.99825 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

0.99825EPSSKEV · LISTED
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationin the wild · KEVreceipt
Defenseno fix version held
Movementrisenreceipt
PLATEAU10Minimal movement since 2025-12-11, 267 days at 1.00, as of 2026-09-04. arc-rules@v1

Foresight · where to check next

Corporationlangflow-aiCVE-2023-28461JetBrainsF5 BIG-IP37415

This record is one instance of CWE-306, missing authentication for critical function. The index holds 3317 prior instances of this class, 54 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-306 Missing Authentication for Critical Functionreceipt
Published consequencesCWE-306: Access Control, Other: Gain Privileges or Assume Identity, Varies by Context[email protected]
Ransomware campaign useUnknown to CISAreceipt

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 4 Sep 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.
CISA remediation statusoverdue since 2021-12-15receipt
CISA required actionApply updates per vendor instructions.receipt
Published to CISA KEV91 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2021-12-01.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed2021-12-01receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.99825 · top 0.04% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes56 · last 9 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesZohocorp manageengine servicedesk plusreceipt
Published rangeszohocorp manageengine servicedesk plus 11.0; zohocorp manageengine servicedesk plus 11.1; zohocorp manageengine servicedesk plus 11.2; zohocorp manageengine servicedesk plus 11.3receipt

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 ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication. 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-306
affected versions
zohocorp manageengine servicedesk plus 11.0; zohocorp manageengine servicedesk plus 11.1; zohocorp manageengine servicedesk plus 11.2; and 1 more, listed in full below
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 manageengine.com manageengine.com receipt

Dated events

2021-12-01Added to CISA KEV2021-12-15CISA remediation due2022-02-04EPSS moved 0.03 to 0.092023-03-07EPSS moved 0.01 to 0.972026-06-15EPSS moved 0.93 to 1.00

Movement the material steps

1 Sep 20210.00624
7 Mar 20230.96706 · crossed 0.10 and 0.50 and 0.90 · scoring model v2023.03.01
17 Mar 20250.89847 · crossed 0.90 · scoring model v2025.03.14
23 Mar 20250.90743 · crossed 0.90
24 Mar 20250.86809 · crossed 0.90
11 Dec 20250.93077 · crossed 0.90
15 Jun 20260.99579 · scoring model v2026.06.15
28 Jul 20260.99825
Show all 45 observations
1 Sep 20210.00624
6 Jan 20220.02742
4 Feb 20220.09029
1 Apr 20220.00885
7 Mar 20230.96706
25 Mar 20230.96505
21 Jun 20230.96362
19 Jul 20230.96062
1 Aug 20230.95802
9 Nov 20230.95820
22 Dec 20230.95621
18 Jan 20240.95751
15 Feb 20240.93591
7 Apr 20240.93503
17 May 20240.93841
12 Jun 20240.92856
7 Aug 20240.93145
17 Mar 20250.89847
23 Mar 20250.90743
24 Mar 20250.86809
29 Mar 20250.89352
30 Mar 20250.86809
2 May 20250.89357
9 Aug 20250.89333
22 Oct 20250.89425
1 Nov 20250.87375
18 Nov 20250.89906
21 Nov 20250.87375
23 Nov 20250.88054
11 Dec 20250.93077
18 Dec 20250.9215
25 Dec 20250.9239
30 Dec 20250.92623
31 Dec 20250.92361
8 Jan 20260.92323
12 Jan 20260.91646
10 Feb 20260.91913
13 Feb 20260.91971
21 Apr 20260.91919
7 May 20260.92952
10 May 20260.92805
18 May 20260.9276
15 Jun 20260.99579
25 Jun 20260.99854
28 Jul 20260.99825

45 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 0.99825Published2021-09-01CISA KEV2021-12-01Index as of2026-09-04

Listed by CISA 91 days after it published and the record had been public for 5 years when this index was last written.

No material movement in 38 days as of the last ingest this index recorded.

Published 2021-09-01 receipt · CISA KEV 2021-12-01 receipt · Index as of 2026-09-04 derived

The pattern, elsewhere

This record is one instance of CWE-306, missing authentication for critical function. The index holds 3317 prior instances of this class, 54 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2026-35273 · Oracle Corporation PeopleSoft Enterprise…matches 8 of 8KEV listed · 2026receipt
CVE-2025-3248 · langflow-ai langflowmatches 8 of 8KEV listed · 2025receipt
CVE-2023-28461matches 8 of 8KEV listed · 2023receipt
CVE-2023-42793 · JetBrains TeamCitymatches 8 of 8KEV listed · 2023receipt
CVE-2023-46747 · F5 BIG-IPmatches 8 of 8KEV listed · 2023receipt
CVE-2022-1388 · F5 BIG-IPmatches 8 of 8KEV listed · 2022receipt

"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

3317 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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