CVE-2018-18765

Name: CVE-2018-18765
Creator: NVD / NIST
Published: 2018-10-29T12:29:10.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.84%

Last modified Jun 17, 2026

CVE-2018-18765 is a vulnerability of currently unknown severity. An exploitable arbitrary memory read vulnerability exists in the MQTT packet-parsing functionality of Cesanta Mongoose 6.13. It is a heap-based buffer over-read in mg_mqtt_next_subscribe_topic. EPSS estimates a 1.84% chance of exploitation in the next 30 days.

Description

An exploitable arbitrary memory read vulnerability exists in the MQTT packet-parsing functionality of Cesanta Mongoose 6.13. It is a heap-based buffer over-read in mg_mqtt_next_subscribe_topic. A specially crafted MQTT SUBSCRIBE packet can cause an arbitrary out-of-bounds memory read potentially resulting in information disclosure and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.

Metrics

EPSS Probability

1.84%

76.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Cesanta	Mongoose	6.13

References

https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20mg_mqtt_next_subscribe_topic%20heap%20buffer%20overflow.mdExploit, Third Party Advisory
https://twitter.com/thracky/status/1059472674940993541Third Party Advisory
https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20mg_mqtt_next_subscribe_topic%20heap%20buffer%20overflow.mdExploit, Third Party Advisory
https://twitter.com/thracky/status/1059472674940993541Third Party Advisory

Timeline

Published: Oct 29, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18765?

How severe is CVE-2018-18765?

Severity scoring for CVE-2018-18765 is pending analysis. The EPSS model estimates a 1.84% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18765?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18765?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST