CVE-2020-13849

7.5 highEPSS 2.1%

High (7.5) in mqtt mqtt. EPSS 2.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2020-06-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mqtt:mqtt

References

https://doi.org/10.3390/s20102932
https://www.mdpi.com/1424-8220/20/10/2932
https://doi.org/10.3390/s20102932
https://www.mdpi.com/1424-8220/20/10/2932

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