CVE-2021-45939

PoC ×2—

CVSS 3.1

5.5 medium

EPSS

<1%p57

Published

Jan 1, 2022 (Jan 1, 2022)

Modified

Jun 17, 2026

Description

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow in MqttClient_DecodePacket (called from MqttClient_WaitType and MqttClient_Subscribe).

Vendors: wolfssl
Products: wolfmqtt
Weakness: CWE-787
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.9%)

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