CVE-2021-21962

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.

• CWE-122
• CWE-787

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1390Exploit, Third Party Advisory
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1390Exploit, Third Party Advisory

Published

Feb 4, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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