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CVE-2021-40684

28
FAUCET Score

CVE-2021-40684 describes a critical vulnerability in Talend ESB Runtime versions 5.1 through 7.3.1-R2021-09, 7.2.1-R2021-09, and 7.1.1-R2021-09. This flaw exposes an unauthenticated Jolokia HTTP endpoint, granting remote attackers direct access to the JMX of the runtime container. With a CVSS score of 9.1 (Critical), the vulnerability allows unauthenticated attackers to read or modify the container and its running software, posing a significant risk of compromise. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.1, < 7.1.1-r2021-09CPE matchmatch criteria
cpe:2.3:a:talend:esb_runtime:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
65.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 52nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

help.talend.com / r/en-US/7.3/release-notes-esb-products
Release NotesVendor Advisory
jira.talendforge.org / browse/SF-141
PatchVendor Advisory