What is CVE-2021-45937?

CVE-2021-45937 is a medium-severity vulnerability in Wolfssl Wolfmqtt, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-01-01.

How severe is CVE-2021-45937?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Wolfssl Wolfmqtt

CVE-2021-45937

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

Vulnerability class: Buffer Overflow

EPSS: 0.009 (55.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Wolfssl Wolfmqtt — versions 1.9
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-45937?: CVE-2021-45937 is a medium-severity vulnerability in Wolfssl Wolfmqtt, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-01-01.
How severe is CVE-2021-45937?: Medium severity. CVSS v3 base score is 5.5 out of 10.