CVE-2021-21959

A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality.

CVSS v3.1

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.0

7.7 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

CVSS v2.0

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

0.84% chance of exploitation in the next 30 days, 55th percentile

Published

2022-02-04

Updated

2025-04-15

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388

References

• CVE Record
• NVD entry

Related

• CVE-2021-21958
• CVE-2021-21960
• CVE-2021-21957
• CVE-2021-21961
• CVE-2021-21956
• CVE-2021-21962