CVE-2021-21962

HighCVSS 8.1/10Last modified Jun 17, 2026

Description

A heap-based buffer overflow vulnerability exists in the OTA Update u-download functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A series of specially-crafted MQTT payloads can lead to remote code execution. An attacker must perform a man-in-the-middle attack in order to trigger this vulnerability.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122CWE-787

Affected software

VendorProductVersions
n/aSealevelSealevel Systems, Inc. SeaConnect 370W v1.3.34

References

Timeline

Published
Feb 4, 2022
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-21962: High severity, CVSS 8.1 | Vulnix