TI-2023-16409 Aliases CVE-2023-33237 GHSA-p33g-779c-ccmq

Authentication Bypass Without Administrator Privilege

MEDIUM 41CWE-863Published 2023-08-17 · Updated 2024-10-28

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

TN-5900 Series firmware version v3.3 and prior is vulnerable to improper-authentication vulnerability. This vulnerability arises from inadequate authentication measures implemented in the web API handler, allowing low-privileged APIs to execute restricted actions that only high-privileged APIs are allowed This presents a potential risk of unauthorized exploitation by malicious actors.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00628 50th 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: No
Technical impact: Total

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.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2023-08-17
Moxa TN-5900 Series — moxa.com/en/support/product-support/security-advisory/mpsa-…
8 records Highest priority Priority MEDIUM 6 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-16411 Second Order Command-injection Vulnerability in the Key-generation FunctionPriority MEDIUM 46
- TI-2023-17051 Second Order Command-injection Vulnerability in the Certificate-generation FunctionPriority MEDIUM 44
- TI-2023-17049 Second Order Command-injection Vulnerability in the Key-generation FunctionPriority MEDIUM 44
Show all 8 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-33237
2026-10-03 Alias added: GHSA-p33g-779c-ccmq
2026-10-29 EPSS moved to the 50th–90th percentile

References

Patch 1

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230402-tn-5900-and-tn-4900-series-web-server-multiple-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