CVE-2021-21968

8.3 highEPSS 1.0%

High (8.3) in sealevel seaconnect 370w firmware. EPSS 1.0% chance of exploitation in the next 30 days.

A file 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 arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Severity

CVSS 3.1

8.3 high

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

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2022-02-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

sealevel:seaconnect_370w_firmware

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1395
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1395

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