What is CVE-2021-21959?

CVE-2021-21959 is a high-severity vulnerability in Sealevel Seaconnect_370w, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2022-02-04.

How severe is CVE-2021-21959?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Sealevel Seaconnect_370w

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.008 (53.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sealevel Seaconnect_370w
Sealevel Seaconnect_370w_firmware — versions 1.3.34
N/a Sealevel — versions Sealevel Systems, Inc. SeaConnect 370W v1.3.34

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21959?: CVE-2021-21959 is a high-severity vulnerability in Sealevel Seaconnect_370w, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2022-02-04.
How severe is CVE-2021-21959?: High severity. CVSS v3 base score is 8.1 out of 10.