TI-2021-21331 Aliases CVE-2021-46559 GHSA-4vj4-c65w-6944

The firmware on Moxa TN-5900 devices through 3.1 has a weak algorithm that allows an…

LOW 33CWE-345Published 2022-01-26 · Updated 2024-08-04

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-345.

Summary

The firmware on Moxa TN-5900 devices through 3.1 has a weak algorithm that allows an attacker to defeat an inspection mechanism for integrity protection.

Why it matters now

EPSS 0.00436 38th percentileScored 2026-11-07

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:tn-5900_firmware::::::::	up to 3.1	Vulnerable	Moxa
cpe:2.3:h:moxa:tn-5900:-:::::::*	not specified by NVD	Running on	Moxa

cpe:2.3:o:moxa:tn-5900_firmware:*:*:*:*:*:*:*:* Versions up to 3.1 Vulnerable ·Moxa
cpe:2.3:h:moxa:tn-5900:-:*:*:*:*:*:*:* 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-2021-46559
2026-10-03 Alias added: GHSA-4vj4-c65w-6944

References

Advisory 1

https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilities

TI-2021-21332 The firmware on Moxa TN-5900 devices through 3.1 allows command injection that could lead to device damage. CVSS 3.1CRITICAL 9.8
TI-2023-16411 Second Order Command-injection Vulnerability in the Key-generation Function CVSS 3.1CRITICAL 9.8
TI-2023-17051 Second Order Command-injection Vulnerability in the Certificate-generation Function CVSS 3.1CRITICAL 9.8
TI-2023-17049 Second Order Command-injection Vulnerability in the Key-generation Function CVSS 3.1CRITICAL 9.8
TI-2023-16410 Command-injection Vulnerability in Certificate Management CVSS 3.1CRITICAL 9.8
TI-2023-17050 Second Order Command-injection Vulnerability in the Certificate-generation Function CVSS 3.1CRITICAL 9.8

See all 10 →

Sources

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