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Mallory
Critical

Privilege escalation via broken access control in Moxa /api/v1/setting/data endpoint

IdentifiersCVE-2025-6893CWE-250· Execution with Unnecessary…

CVE-2025-6893 is an execution with unnecessary privileges vulnerability in Moxa network security appliances and routers. The flaw is caused by broken access control in the /api/v1/setting/data endpoint, which fails to enforce the required authorization checks. As a result, a low-privileged authenticated user can call this API and access or modify system configuration data that should require higher privileges. Successful exploitation can expose sensitive device settings and enable privilege escalation on the affected device.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A low-privileged authenticated attacker can read or alter protected system configuration data and potentially escalate privileges on the affected Moxa device. The advisory characterizes the impact on the device as high, with possible severe effects on confidentiality, integrity, and availability of the affected appliance or router. The provided source material states there is no loss of confidentiality or integrity in subsequent systems.

Mitigation

If you can’t patch tonight, do this now.

Until firmware updates can be applied, restrict access to management interfaces and API endpoints to trusted administrative networks and accounts only, minimize the number of low-privileged accounts on affected devices, and increase monitoring for suspicious requests to /api/v1/setting/data and unexpected configuration changes. Because exploitation uses valid authenticated access, review account activity and device configuration for signs of abuse. Apply patches with priority after appropriate testing.

Remediation

Patch, then assume compromise.

Apply the latest Moxa firmware updates addressing CVE-2025-6893. The provided advisory material indicates affected products include multiple Moxa appliance/router series in versions prior to v3.21, and directs users to Moxa security bulletin MPSA-258121 for fixes. For the OnCell G4302-LTE4 series, Moxa indicates customers should contact technical support to obtain the patch.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
MoxaEdf-G1002-Bp Serieshardware
MoxaEdr-8010 Seriesapplication
MoxaEdr-G9010 Seriesapplication
MoxaNat-102 Serieshardware
MoxaNat-108 Serieshardware
MoxaOncell G4302-Lte4 Serieshardware
MoxaTn-4900 Serieshardware

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.