CVE-2021-21964
HIGHCVSS 7.4/10EPSS 0.70%
Last modified
CVE-2021-21964 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A denial of service vulnerability exists in the Modbus configuration functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. EPSS estimates a 0.70% chance of exploitation in the next 30 days.
Description
A denial of service vulnerability exists in the Modbus configuration functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. Specially-crafted network packets can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sealevel | Seaconnect 370w Firmware | 1.3.34 |
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1392Exploit, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1392Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21964?
A denial of service vulnerability exists in the Modbus configuration functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. Specially-crafted network packets can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.
How severe is CVE-2021-21964?
CVE-2021-21964 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21964?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-21959A misconfiguration exists in the MQTTS functionality of Seal…8.1
- CVE-2021-2196Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
- CVE-2021-21960A stack-based buffer overflow vulnerability exists in both t…10
- CVE-2021-21961A stack-based buffer overflow vulnerability exists in the NB…10
- CVE-2021-21962A heap-based buffer overflow vulnerability exists in the OTA…8.1
- CVE-2021-21963An information disclosure vulnerability exists in the Web Se…5.9
- CVE-2021-21965A denial of service vulnerability exists in the SeaMax remot…9.3
- CVE-2021-21966An information disclosure vulnerability exists in the HTTP S…5.3
- CVE-2021-21967An out-of-bounds write vulnerability exists in the OTA updat…5.9
- CVE-2021-21968A file write vulnerability exists in the OTA update task fun…8.3
- CVE-2021-21969An out-of-bounds write vulnerability exists in the HandleSea…8.1
- CVE-2021-2197Vulnerability in the Oracle iStore product of Oracle E-Busin…8.2
Are you affected by CVE-2021-21964?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST