Is CVE-2021-41039 actively exploited?

CVE-2021-41039 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-41039?

CVE-2021-41039 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-41039?

Patch guidance is available from eclipse security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-41039.

Fix CVE-2021-41039 - HIGH eclipse mosquitto

Description

In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-1050NVD-CWE-Other

Metadata

Primary Vendor: ECLIPSE
Published: 12/1/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

eclipse : mosquitto

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-41039. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-41039

View on NIST NVD

CVE-2021-41039 vulnerability