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

Vendor	Product	Versions
n/a	Sealevel	Sealevel Systems, Inc. SeaConnect 370W v1.3.34

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406Not Applicable, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1397Exploit, Technical Description, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406Not Applicable, Third Party Advisory

Timeline

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

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