CVE-2021-34432

HIGH 7.5CVE-2021-34432 · Published 27/07/2021 · updated 02/07/2026

In short

CVE-2021-34432 is a HIGH (CVSS 7.5) vulnerability affecting mosquitto (eclipse).
Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 69.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mosquitto eclipse	`≤ 2.0.7`	No fix yet

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.

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Package

Affected versions

Patched versions

≤ 2.0.7

No fix yet

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