CVE-2021-21971

MediumCVSS 5.9/10Last modified Jun 17, 2026

Description

An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-787

Affected software

No affected versions have been published.

Timeline

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

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CVE-2021-21971: Medium severity, CVSS 5.9 | Vulnix