CVE-2021-21961
10.0 · CRITICALOverview
CVE-2021-21961 is a critical-severity vulnerability affecting sealevel seaconnect_370w_firmware. It was published on February 4, 2022 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A stack-based buffer overflow vulnerability exists in the NBNS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted network packet can lead to remote code execution. An attacker can send a malicious packet to trigger this vulnerability.
Remediation
Check the references section for vendor advisories and patches from sealevel. Update seaconnect_370w_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2021-21961?
CVE-2021-21961 is a critical-severity vulnerability affecting sealevel seaconnect_370w_firmware. It was published on February 4, 2022 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
How severe is CVE-2021-21961?
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21961?
Check the references section for vendor advisories and patches from sealevel. Update seaconnect_370w_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21961?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21961 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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