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HIGH · 8.1

CVE-2021-21962

A heap-based buffer overflow vulnerability exists in the OTA Update u-download functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A series of specially-crafted MQTT payloads can lead to ...

Vulnerability Description

A heap-based buffer overflow vulnerability exists in the OTA Update u-download functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A series of specially-crafted MQTT payloads can lead to remote code execution. An attacker must perform a man-in-the-middle attack in order to trigger this vulnerability.

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
SealevelSeaconnect 370W Firmware1.3.34
SealevelSeaconnect 370W-

Related Weaknesses (CWE)

CWE-122CWE-787

References

FAQ

What is CVE-2021-21962?

CVE-2021-21962 is a vulnerability with a CVSS score of 8.1 (HIGH). A heap-based buffer overflow vulnerability exists in the OTA Update u-download functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A series of specially-crafted MQTT payloads can lead to ...

How severe is CVE-2021-21962?

CVE-2021-21962 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-21962?

Check the references section above for vendor advisories and patch information. Affected products include: Sealevel Seaconnect 370W Firmware, Sealevel Seaconnect 370W.