CVE-2016-9361: moxa nport_5100_series_firmware Improper Authentication
Vulnerability summary
CVE-2016-9361 is a critical (CVSS 9.8) Improper Authentication vulnerability in moxa nport_5100_series_firmware. EPSS estimates a 20.37% chance of exploitation in the next 30 days, higher than 97.4% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 13-02-2017PublishedVulnerability first disclosed.
- 02-06-2026Last modifiedVulnerability information updated.
Description
An issue was discovered in Moxa NPort 5110 versions prior to 2.6, NPort 5130/5150 Series versions prior to 3.6, NPort 5200 Series versions prior to 2.8, NPort 5400 Series versions prior to 3.11, NPort 5600 Series versions prior to 3.7, NPort 5100A Series & NPort P5150A versions prior to 1.3, NPort 5200A Series versions prior to 1.3, NPort 5150AI-M12 Series versions prior to 1.2, NPort 5250AI-M12 Series versions prior to 1.2, NPort 5450AI-M12 Series versions prior to 1.2, NPort 5600-8-DT Series versions prior to 2.4, NPort 5600-8-DTL Series versions prior to 2.4, NPort 6x50 Series versions prior to 1.13.11, NPort IA5450A versions prior to v1.4. Administration passwords can be retried without authenticating.
CVSS metrics
4 scores · 2 sources · 3 versions- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
20.37%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
+0.52 pp
From 19.86% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundMoxa Device Credential Retrieval
auxiliary/admin/scada/moxa_credentials_recovery
Maturity: poc
Moxa UDP Device Discovery
auxiliary/scanner/scada/moxa_discover
Maturity: poc
Weaknesses
CWE · root cause- CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
- CWE-307Improper Restriction of Excessive Authentication AttemptsThe product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
Affected systems
Moxa10 products
- nport_5100_series_firmware≤ 2.5 | ≤ 3.5
- nport_5100a_series_firmware≤ 1.2
- nport_5200_series_firmware≤ 2.7
- nport_5200a_series_firmware≤ 1.2
- nport_5400_series_firmware≤ 3.10
1 vendor · 10 products
References
2 links- ics-cert.us-cert.gov/advisories/ICSA-16-336-02X Refsource MISCThird Party AdvisoryUS Government Resource