CVE-2021-40684Network attack vector

Unauthorized JMX access via unauthenticated Jolokia endpoint

Published Sep 22, 2021 · Updated Aug 4, 2024

Authentication bypass in Talend ESB Runtime 5.1 through 7.3.1-R2021-09 allows remote attackers to read or modify runtime state. The Jolokia HTTP/JSON bridge forwards unauthenticated requests to the runtime container's JMX interface, exposing managed-object reads and modifications. Any remote attacker who can reach the endpoint can inspect or alter the container and software running inside it without credentials.

CVSS severity9.1
Critical
EPSS probability1.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Talend ESB Runtime 5.1 through 7.3.1-R2021-09 allows remote attackers to read or modify runtime state. The Jolokia HTTP/JSON bridge forwards unauthenticated requests to the runtime container's JMX interface, exposing managed-object reads and modifications. Any remote attacker who can reach the endpoint can inspect or alter the container and software running inside it without credentials.

The record

CVE
CVE-2021-40684
Published
Sep 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NVDAV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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