CVE-2021-21963

Name: CVE-2021-21963
Creator: NVD / NIST
Published: 2022-02-04T23:15:10.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2021-21963 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. An information disclosure vulnerability exists in the Web Server functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

An information disclosure vulnerability exists in the Web Server functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted man-in-the-middle attack can lead to a disclosure of sensitive information. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.48%

37.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sealevel	Seaconnect 370w Firmware	1.3.34

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1391Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1391Third Party Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21963?

How severe is CVE-2021-21963?

CVE-2021-21963 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21963?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST