What’s Vulnerable › Vulnerabilities

CVE-2021-21961

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-02-04 · updated 2026-06-17
• Weakness: CWE-121

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.

Affected products

• Sealevel Systems, Inc. SeaConnect 370W: 1.3.34

References

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1389
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1389

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