HOMEVULNERABILITIESCVE-2020-27185
HIGH

CVE-2020-27185

CWE-319Published: May 14, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Cleartext transmission of sensitive information via Moxa Service in NPort IA5000A series serial devices. Successfully exploiting the vulnerability could enable attackers to read authentication data, device configuration, and other sensitive data transmitted over Moxa Service.

NVD Source

Technical Analysis

CVE-2020-27185 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

moxa6 product(s)
nport ia5150a firmwarenport ia5150anport ia5250a firmwarenport ia5250anport ia5450a firmwarenport ia5450a
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.moxa.com/en/support/product-support/security-advisory/nport-ia5000a-serial-device-servers-vulnerabilities
ADVISORYhttps://www.moxa.com/en/support/product-support/security-advisory/nport-ia5000a-serial-device-servers-vulnerabilities

All References (4)

→
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2021/05/11/klcert-20-021%2C
→
https://www.moxa.com/en/support/product-support/security-advisory/nport-ia5000a-serial-device-servers-vulnerabilitiesVendor Advisory
→
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2021/05/11/klcert-20-021%2C
→
https://www.moxa.com/en/support/product-support/security-advisory/nport-ia5000a-serial-device-servers-vulnerabilitiesVendor Advisory

Quick Facts

CVE IDCVE-2020-27185
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-319
CISA KEVNo
Affected1 vendor(s)
PublishedMay 14, 2021

Related CVEs (CWE-319)

CVE-2025-47419
10.0
CVE-2025-4378
10.0
CVE-2018-11421
9.8
CVE-2018-7246
9.8
CVE-2018-11422
9.8
CVE-2025-34271
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27185 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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