HOMEVULNERABILITIESCVE-2020-23639
CRITICAL

CVE-2020-23639

CWE-77Published: November 2, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A command injection vulnerability exists in Moxa Inc VPort 461 Series Firmware Version 3.4 or lower that could allow a remote attacker to execute arbitrary commands in Moxa's VPort 461 Series Industrial Video Servers.

NVD Source

Technical Analysis

CVE-2020-23639 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), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

moxa2 product(s)
vport 461 firmwarevport 461
Source: NVD CPE · 2 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/support/security-advisory/vport-461-series-industrial-video-servers-vulnerabilities
ADVISORYhttps://www.moxa.com/en/support/support/security-advisory/vport-461-series-industrial-video-servers-vulnerabilities

All References (2)

→
https://www.moxa.com/en/support/support/security-advisory/vport-461-series-industrial-video-servers-vulnerabilitiesVendor Advisory
→
https://www.moxa.com/en/support/support/security-advisory/vport-461-series-industrial-video-servers-vulnerabilitiesVendor Advisory

Quick Facts

CVE IDCVE-2020-23639
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedNov 2, 2020

Related CVEs (CWE-77)

CVE-2015-6912
10.0
CVE-2018-16462
10.0
CVE-2013-2810
10.0
CVE-2014-9188
10.0
CVE-2014-9682
10.0
CVE-2015-1815
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-23639 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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