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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-...
CVE-2021-33823 · published 5 years ago
Summary
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.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| moxa | mgate_mb3180_firmware |
2.1 cpe:2.3:o:moxa:mgate_mb3180_firmware:2.1:build_18113012:*:*:*:*:*:* |
Original advisory text
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-...
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.
References
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.md Exploit Third Party Advisory
- https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/... Product Vendor Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published18 Jun 2021
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2021-33823 · NVD
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