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No exploitation reportedFix available

CVE-2016-10523

No exploitation reported by the sources we read.

  • Published2018-05-31
  • Fixed in4.0.5 · 3.4.6
  • WeaknessCWE-119 · CWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

MQTT before 3.4.6 and 4.0.x before 4.0.5 allows specifically crafted MQTT packets to crash the application, making a DoS attack feasible with very little bandwidth.

Timeline

dates in UTC
  1. 2018-05-3120:29CVE publishedNVD

Versions per branch

NVD · OSV
Mqtt-packet project mqtt-packet
BranchAffectedFixed in
4.0≥ 4.0.0, < 4.0.54.0.5
3.4< 3.4.63.4.6

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Mqtt-packet project mqtt-packet to 4.0.5 · 3.4.6

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-400known since 2026-10-23
  • NVDweakness (CWE)CWE-119read 2026-10-23
  • FIRST EPSSEPSS score2.4 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2020-06-16

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-05-31
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-g3r2-65gc-qpqc

Frequently asked questions

What is CVE-2016-10523?

MQTT before 3.4.6 and 4.0.x before 4.0.5 allows specifically crafted MQTT packets to crash the application, making a DoS attack feasible with very little bandwidth.

Is CVE-2016-10523 actively exploited?

Active exploitation of CVE-2016-10523 has not been confirmed. Its EPSS score was 2.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-10523?

CVE-2016-10523 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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