CVE-2020-13849

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://doi.org/10.3390/s20102932Technical Description, Third Party Advisory
https://www.mdpi.com/1424-8220/20/10/2932Technical Description, Third Party Advisory
https://doi.org/10.3390/s20102932Technical Description, Third Party Advisory
https://www.mdpi.com/1424-8220/20/10/2932Technical Description, Third Party Advisory

Timeline

Published: Jun 4, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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