CVE-2021-45933

MEDIUM 5.5CVE-2021-45933 · Published 01/01/2022 · updated 17/06/2026

In short

CVE-2021-45933 is a MEDIUM (CVSS 5.5) vulnerability affecting wolfmqtt (wolfssl).
Chance of exploitation in the next 30 days (EPSS): 0.92%, higher than 60.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
wolfmqtt wolfssl	`= 1.9`	No fix yet

Description

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow (8 bytes) in MqttDecode_Publish (called from MqttClient_DecodePacket and MqttClient_HandlePacket).

References

bugs.chromium.org/p/oss-fuzz/issues/detail · Exploit
google/oss-fuzz-vulns · Exploit
wolfSSL/wolfMQTT commit 84d4b53 · Patch

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Package

Affected versions

Patched versions

wolfmqtt

wolfssl

= 1.9

No fix yet

More vulnerabilities in wolfmqtt

See all →