CRITICAL

CVE-2019-19307

CVSS v3

9.8

CRITICAL

EPSS Score

42.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2019-19307 yet.

Full record on NVD

Description

An integer overflow in parse_mqtt in mongoose.c in Cesanta Mongoose 6.16 allows an attacker to achieve remote DoS (infinite loop), or possibly cause an out-of-bounds write, by sending a crafted MQTT protocol packet.

Technical details

Published: 2019-11-26

Frequently asked questions

What is CVE-2019-19307?

Is CVE-2019-19307 actively exploited?

Active exploitation of CVE-2019-19307 has not been confirmed. Its EPSS score was 42.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-19307?

CVE-2019-19307 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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