---
id: CVE-2025-62773
title: >-
  Mercku M6a devices through 2.1.0 allow TELNET sessions via a
  router.telnet.enabled.update request by an administrator.
summary: >-
  Mercku M6a devices through 2.1.0 allow TELNET sessions via a
  router.telnet.enabled.update request by an administrator.
severity: low
cvss: 2.4
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-912
published: '2025-10-22'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62773'
references:
  - url: 'https://blog.nullvoid.me/posts/mercku-exploits/'
    label: cve@mitre.org
  - url: 'https://seclists.org/fulldisclosure/2025/Oct/10'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00173
epssPercentile: 0.06115
ingestedAt: '2026-10-08T11:31:27.479Z'
---

## Overview

Mercku M6a devices through 2.1.0 allow TELNET sessions via a router.telnet.enabled.update request by an administrator.

## Remediation

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