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 attack to trigger this vulnerability.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
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)
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1394 (Exploit, Third Party Advisory)
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.