CVE-2025-1977Network attack vector

Authenticated configuration changes via read-only MCC access

Published Dec 31, 2025 · Updated Dec 31, 2025

Execution with unnecessary privileges in Moxa NPort 6100-G2/6200-G2 Series firmware 1.0.0 allows remote authenticated users to change device settings. Moxa has not published the internal MCC authorization logic that incorrectly permits configuration writes from a read-only account. Exploitation requires specific system conditions or configurations, and the reported consequence is limited to unauthorized changes on the affected device.

CVSS severity7.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Execution with unnecessary privileges in Moxa NPort 6100-G2/6200-G2 Series firmware 1.0.0 allows remote authenticated users to change device settings. Moxa has not published the internal MCC authorization logic that incorrectly permits configuration writes from a read-only account. Exploitation requires specific system conditions or configurations, and the reported consequence is limited to unauthorized changes on the affected device.

The record

CVE
CVE-2025-1977
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
Moxa
Product
NPort 6100-G2/6200-G2 Series
Classifications
CWE-250, CAPEC-122
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moxa · NPort 6100-G2/6200-G2 Seriesversion=1.0.0

Published CVSS scores

7.7Moxa Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-250Execution with Unnecessary Privileges
CAPEC-122Privilege Abuse

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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