CVE-2026-78861: MERCUSYS AC12 V2 vulnerability

Published Oct 5, 2026
·
Updated

An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via a hardcoded 512-bit RSA Private Key

Affected Software

1 affected component
MERCUSYS AC12 V2

Event History

Oct 5, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·08:17 PM
Description

Frequently Asked Questions

1

Who is exposed to this issue?

The affected product identified in the available data is the Mercusys AC12 V2. Exploitation is described as requiring a local attacker, so exposure is limited to attackers with local access or access to the same local environment.

2

What level of access does an attacker need?

The issue is described as exploitable by a local attacker. The provided information does not indicate that it can be exploited remotely over the internet.

3

What is the potential impact if exploitation succeeds?

A successful attacker can execute arbitrary code on the affected device. This could allow the attacker to run attacker-controlled code in the device environment.

4

What should teams do if they cannot patch immediately?

Restrict local access to the device and limit access to the local network environment where it is deployed. The provided data does not list a vendor mitigation or workaround.

Contact

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