CVE-2021-34432

7.5 highEPSS 1.2%

High (7.5) in eclipse mosquitto. EPSS 1.2% chance of exploitation in the next 30 days.

In Eclipse Mosquitto versions 2.0.7 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.

Severity

7.5 high

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

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2021-07-27
Modified: 2026-07-02
Record from: the NVD, synced 2026-10-19