CVE-2021-41039
7.5
HIGH
CVSS 3.1
EPSS 0.25%
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.
How to fix CVE-2021-41039
To remediate CVE-2021-41039, upgrade the affected package to a fixed version below.
- Debian/mosquitto—upgrade to 2.0.11-1+deb11u1 or later
Is CVE-2021-41039 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.0.11-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |