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Status published
Critical
CVE-2021-21962
A heap-based buffer overflow vulnerability exists in the OTA Update...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
Affected Software
Sealevel
Vulnerable Versions:
Sealevel Systems, Inc. SeaConnect 370W v1.3.34
Timeline
Official Publish:
February 4th, 2022
Last Modified:
April 15th, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H