CVE-2025-62775Public exploit

Root shell access via reused admin password

Published Oct 22, 2025 · Updated Oct 22, 2025

Privilege escalation in Mercku M6a 2.1.0 and earlier allows remote authenticated users to gain a root shell through TELNET. The TELNET authentication path accepts the web administration password for the root account instead of separating administrative and operating-system credentials. An attacker must reach the router over an adjacent network and know the web admin password; successful login grants unrestricted command execution and complete device control.

CVSS severity8.0
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Mercku M6a 2.1.0 and earlier allows remote authenticated users to gain a root shell through TELNET. The TELNET authentication path accepts the web administration password for the root account instead of separating administrative and operating-system credentials. An attacker must reach the router over an adjacent network and know the web admin password; successful login grants unrestricted command execution and complete device control.

The record

CVE
CVE-2025-62775
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Mercku
Product
M6a
Classifications
CWE-669, T1078
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=0 <=2.1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Mercku · M6aversion=0 <=2.1.0

Published CVSS scores

8.0MITRECVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-669Incorrect Resource Transfer Between Spheres
T1078Valid Accounts

Public exploit references

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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