CVE-2021-21967

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

CVSS v3.1

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

CVSS v3.0

6.5 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v2.0

7.1 HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C

EPSS

0.73% chance of exploitation in the next 30 days, 52th percentile

Published

2022-04-14

Updated

2025-04-15

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1394

References

• CVE Record
• NVD entry

Related

• CVE-2021-21966
• CVE-2021-21968
• CVE-2021-21965
• CVE-2021-21969
• CVE-2021-21964
• CVE-2021-21970