TI-2023-03121 Aliases CVE-2023-3336 GHSA-78g4-c5r9-6gh7

TN-5900 Series User Enumeration Vulnerability

LOW 31CWE-204Published 2023-07-05 · Updated 2024-11-20

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-204.

Summary

TN-5900 Series version 3.3 and prior versions is vulnearble to user enumeration vulnerability. The vulnerability may allow a remote attacker to determine whether a user is valid during password recovery through the web login page and enable a brute force attack with valid users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00608 49th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Moxa	TN-5900 Series	1.0 – 3.3	—	No fix listed	CNA

TN-5900 Series VendorMoxa Affected 1.0 – 3.3 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:moxa:tn-5900_firmware::::::::	up to 3.3	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 3.3 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-2023-3336
2026-10-03 Alias added: GHSA-78g4-c5r9-6gh7

References

Advisory 1

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230401-tn-5900-series-user-enumeration-vulnerability

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