TI-2021-13175 Aliases CVE-2021-33823 GHSA-rwxq-4j33-72w4

An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012.

LOW 36Published 2021-06-18 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

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.

Why it matters now

EPSS 0.01321 71st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:moxa:mgate_mb3180_firmware:2.1:build_18113012::::::	2.1 build_18113012	Vulnerable	Moxa
cpe:2.3:h:moxa:mgate_mb3180:-:::::::*	not specified by NVD	Running on	Moxa

cpe:2.3:o:moxa:mgate_mb3180_firmware:2.1:build_18113012:*:*:*:*:*:* Versions 2.1 build_18113012 Vulnerable ·Moxa
cpe:2.3:h:moxa:mgate_mb3180:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-33823
2026-10-03 Alias added: GHSA-rwxq-4j33-72w4

References

Exploit 1

https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.md

Advisory 1

https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-series

TI-2016-05035 Moxa MGate MB3180 before 1.8, MGate MB3280 before 2.7, MGate MB3480 before 2.6, MGate… CVSS 3.1CRITICAL 9.8
TI-2021-03032 ICSA-21-357-01 Moxa MGate Protocol Gateways CVSS 3.1CRITICAL 9.8
TI-2021-13176 An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences