CVE-2021-21967

5.9 mediumEPSS 0.7%

Medium (5.9) in sealevel seaconnect 370w firmware. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.9 medium

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE: CWE-120
Published: 2022-04-14
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

sealevel:seaconnect_370w_firmware

References

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

Check your stack JSON