CVE-2021-4040

Name: CVE-2021-4040
Creator: NVD / NIST
Published: 2022-08-24T16:15:09.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.50%

Last modified Jun 17, 2026

CVE-2021-4040 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. EPSS estimates a 2.50% chance of exploitation in the next 30 days.

Description

A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.50%

82.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Amq Broker	< 7.10.0
Apache	Artemis	< 2.19.1

References

https://access.redhat.com/security/cve/CVE-2021-4040Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2028254Issue Tracking, Vendor Advisory
https://github.com/apache/activemq-artemis/pull/3871/commitsPatch, Third Party Advisory
https://issues.apache.org/jira/browse/ARTEMIS-3593Patch, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4040Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2028254Issue Tracking, Vendor Advisory
https://github.com/apache/activemq-artemis/pull/3871/commitsPatch, Third Party Advisory
https://issues.apache.org/jira/browse/ARTEMIS-3593Patch, Third Party Advisory

Timeline

Published: Aug 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4040?

How severe is CVE-2021-4040?

CVE-2021-4040 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4040?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4040?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST