---
id: CVE-2025-50398
title: >-
  Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer
  Overflow in the function sub_404CAEDC via the parameter fac_password.
summary: >-
  Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer
  Overflow in the function sub_404CAEDC via the parameter fac_password.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-120
vendor: mercurycom
product: d196g_firmware
affected:
  - d196g_firmware
published: '2025-12-16'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-50398'
references:
  - url: 'https://github.com/sezangel/IOT-vul/tree/main/Mercury/D196G/2'
    label: cve@mitre.org
  - url: 'https://github.com/sezangel/IOT-vul/tree/main/Mercury/D196G/2'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00422
epssPercentile: 0.34674
ingestedAt: '2026-10-13T11:23:51.109Z'
---

## Overview

Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter fac_password.

## Affected

- `d196g_firmware`

## Remediation

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