What is CVE-2021-21967?

CVE-2021-21967 is a medium-severity vulnerability in Sealevel Seaconnect_370w, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2022-04-14.

How severe is CVE-2021-21967?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Sealevel Seaconnect_370w

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…

Vulnerability class: Buffer Overflow

EPSS: 0.007 (48.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Sealevel Seaconnect_370w
Sealevel Seaconnect_370w_firmware — versions 1.3.34
Sealevel Systems, Inc. Seaconnect 370w — versions v1.3.34

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

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

Frequently asked questions

What is CVE-2021-21967?: CVE-2021-21967 is a medium-severity vulnerability in Sealevel Seaconnect_370w, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2022-04-14.
How severe is CVE-2021-21967?: Medium severity. CVSS v3 base score is 5.9 out of 10.