---
id: CVE-2026-86325
title: >-
  A stack-based buffer overflow vulnerability exists in protocol gateways'
  account management interface
summary: >-
  A stack-based buffer overflow vulnerability exists in protocol gateways'
  account management interface. The vulnerability is caused by insufficient
  length validation of the `account_name` parameter when processing account
  management reque…
severity: critical
cvss: 9.4
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-121
vendor: Moxa
product: MGate MB3170 Series
affected:
  - mgate_mb3170_series >= 1.0 <= 4.7
  - mgate_mb3270_series >= 1.0 <= 4.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T11:17:36.173'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86325'
references:
  - url: >-
      https://www.moxa.com/en/support/product-support/security-advisory/mpsa-269540-cve-2026-86325,-cve-2026-86326-two-vulnerabilities-in-protocol-gateways
    label: psirt@moxa.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-02T10:49:27.817598Z'
cvssSource: cna
ingestedAt: '2026-10-02T11:16:44.274Z'
---

## Overview

A stack-based buffer overflow vulnerability exists in protocol gateways' account management interface. The vulnerability is caused by insufficient length validation of the `account_name` parameter when processing account management requests. An attacker authenticated as a read-only user to the web management interface could supply a specially crafted account name that exceeds the size of the internal stack buffer, resulting in corruption of program execution flow. Successful exploitation could allow an attacker to read sensitive information from device memory, including credentials, modify arbitrary memory contents, and disrupt device availability.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.