CVE-2023-33238 — 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 inadequate input validation in the certificate management function, which could potentially a

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 inadequate input validation in the certificate management 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: 2023-08-17T02:04:50.789Z
• Last modified: 2024-10-28T06:03:40.655Z

09References

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