What’s Vulnerable › Vulnerabilities

CVE-2020-13849

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-04 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• Mqtt: 3.1.1

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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