CVE-2021-21962 CRITICAL

CVE-2021-21962

Vendor N/A
Product Sealevel
Weakness CWE-122
Published February 4, 2022
Last update April 15, 2025

CVSS base score

9.0/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 4, 2022 CVE published
April 15, 2025 Record updated