CVE-2021-45939 describes a heap-based buffer overflow in the MqttClient_DecodePacket function within wolfSSL wolfMQTT version 1.9. This vulnerability, triggered by specific calls to MqttClient_WaitType and MqttClient_Subscribe, could lead to a denial of service. With a CVSS score of 5.5 (Medium), it requires local access and user interaction for exploitation, primarily impacting availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.9CPE matchmatch criteria | cpe:2.3:a:wolfssl:wolfmqtt:1.9:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.