Vulnerability · Published Feb 4, 2022 · Assigned by talos

CVE-2021-21962

Critical 9.0

In plain English

A critical-severity heap buffer overflow in Sealevel. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).

Severity (CVSS 3.0)9.0Critical

Exploit odds (30 days)2.0%top 19.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	Sealevel	Sealevel Systems, Inc. SeaConnect 370W v1.3.34

Weakness: CWE-122 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1390 x_refsource_MISC