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CVE-2021-33823 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.md	CVE	ExploitThird Party Advisory
https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-series	CVE	ProductVendor Advisory
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.md	[email protected]	ExploitThird Party Advisory
https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-series	[email protected]	ProductVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]

Affected Products

Product	Versions
moxa mgate mb3180 firmware	2.1 build_18113012
CPE cpe:2.3:o:moxa:mgate_mb3180_firmware:2.1:build_18113012:::::: Remediation No remediation found in references.
moxa mgate mb3180	All versions
CPE cpe:2.3:h:moxa:mgate_mb3180:-:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jul 12, 2022	CWE Remap	[email protected]
Jun 24, 2021	Initial Analysis	[email protected]