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NVD / CVE Program· CNA Moxa

CVE-2023-4929: NPort 5000 Series Firmware Improper Validation of Integrity Check Vulnerability

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.31% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Severity is disputed: the assigning authority (CNA) scores it 6.5, NVD 8.8.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

All firmware versions of the NPort 5000 Series are affected by an improper validation of integrity check vulnerability. This vulnerability results from insufficient checks on firmware updates or upgrades, potentially allowing malicious users to manipulate the firmware and gain control of devices.

HighCVSS 8.8 · v3.1—No exploit No fix recorded
Published
Oct 3, 2023
Updated
Jun 17, 2026
EPSS
0.3% · 24th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.8
CNA · Moxa
6.5
2.3 point gap

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-4929

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
moxanport 5150ai-m12-ct-t firmware
moxanport 5150ai-m12-ct-t
moxanport 5250ai-m12-ct-t firmware
moxanport 5250ai-m12-ct-t
moxanport 5150ai-m12-t firmware
moxanport 5150ai-m12-t
moxanport 5250ai-m12-t firmware
moxanport 5250ai-m12-t
moxanport 5450ai-m12-ct-t firmware
moxanport 5450ai-m12-ct-t
moxanport 5150ai-m12 firmware
moxanport 5150ai-m12

and 188 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • moxa nport 5110 firmwareup to 2.10 inclusive
  • moxa nport 5110-t firmwareup to 2.10 inclusive
  • moxa nport 5110a firmwareup to 1.6 inclusive
  • moxa nport 5110a-t firmwareup to 1.6 inclusive
  • moxa nport 5130 firmwareup to 3.10 inclusive
  • moxa nport 5130a firmwareup to 1.6 inclusive
  • moxa nport 5130a-t firmwareup to 1.6 inclusive
  • moxa nport 5150 firmwareup to 3.10 inclusive
  • moxa nport 5150a firmwareup to 1.6 inclusive
  • moxa nport 5150a-t firmwareup to 1.6 inclusive
  • moxa nport 5150ai-m12 firmwareup to 1.5 inclusive
  • moxa nport 5150ai-m12-ct firmwareup to 1.5 inclusive
  • moxa nport 5150ai-m12-ct-t firmwareup to 1.5 inclusive
  • moxa nport 5150ai-m12-t firmwareup to 1.5 inclusive
  • moxa nport 5210 firmwareup to 2.12 inclusive
  • moxa nport 5210-t firmwareup to 2.12 inclusive
  • moxa nport 5210a firmwareup to 1.6 inclusive
  • moxa nport 5210a-t firmwareup to 1.6 inclusive
  • moxa nport 5230 firmwareup to 2.12 inclusive
  • moxa nport 5230-t firmwareup to 2.12 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Moxa). Independent of NVD's CPE analysis and usually ahead of it.

  • Moxa NPort 5000AI-M12 Series

    • 1.0 and later · up to and including 1.5affected

  • Moxa NPort 5100 Series

    • 1.0 and later · up to and including 3.10affected

  • Moxa NPort 5100A Series

    • 1.0 and later · up to and including 1.6affected

  • Moxa NPort 5200 Series

    • 1.0 and later · up to and including 2.12affected

  • Moxa NPort 5200A Series

    • 1.0 and later · up to and including 1.6affected

  • Moxa NPort 5400 Series

    • 1.0 and later · up to and including 3.14affected

  • Moxa NPort 5600 Series

    • 1.0 and later · up to and including 3.11affected

  • Moxa NPort 5600-DT Series

    • 1.0 and later · up to and including 2.9affected

  • Moxa NPort IA5000 Series

    • 1.0 and later · up to and including 2.1affected

  • Moxa NPort IA5000A Series

    • 1.0 and later · up to and including 2.0affected

  • Moxa NPort IA5000A-I/O Series

    • 1.0 and later · up to and including 2.0affected

  • Moxa NPort IAW5000A-I/O Series

    • 1.0 and later · up to and including 2.2affected

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-354 · Improper Validation of Integrity Check Value

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records