CVE-2021-33823
HIGHCVSS 7.5/10EPSS 1.52%
Last modified
CVE-2021-33823 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. EPSS estimates a 1.52% chance of exploitation in the next 30 days.
Description
An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Moxa | Mgate Mb3180 Firmware | 2.1 | Build 18113012 |
References
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.mdExploit, Third Party Advisory
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.mdExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33823?
An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.
How severe is CVE-2021-33823?
CVE-2021-33823 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33823?
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.
- 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.
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Are you affected by CVE-2021-33823?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST