CVE-2023-33239 — TN-4900 Series firmware versions v1

TN-4900 Series firmware versions v1.2.4 and prior and TN-5900 Series firmware versions v3.3 and prior are vulnerable to the command injection vulnerability. This vulnerability stems from insufficient input validation in the key-generation function, which could potentially allow m

01What is this vulnerability?

TN-4900 Series firmware versions v1.2.4 and prior and TN-5900 Series firmware versions v3.3 and prior are vulnerable to the command injection vulnerability. This vulnerability stems from insufficient input validation in the key-generation function, which could potentially allow malicious users to execute remote code on affected devices.

02Affected products

Vendor	Product	Versions
Moxa	TN	5900 Series — 1.0
Moxa	TN	4900 Series — 1.0
Moxa	EDR	810 Series — 1.0
Moxa	EDR	G902 Series — 1.0
Moxa	EDR	G903 Series — 1.0
Moxa	EDR	G9010 Series — 1.0
Moxa	NAT	102 Series — 1.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-17T02:13:25.280Z
• Last modified: 2024-10-28T06:04:52.923Z

09References

• www.moxa.com — https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230402-tn…