External risk intelligence

Mennekes Amtron Authentication Bypass Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-8979

The Mennekes Amtron series are electric vehicle charging stations. These devices are frequently deployed as internet-connected appliances to allow remote monitoring and management by owners or operators, making the web-based administrative interface reachable via the network.

Authentication Bypass

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This CVE involves a critical vulnerability in certain electric vehicle charging stations that allows an unauthenticated remote attacker to bypass authentication and change user passwords. The main concern is confirming relevance and exposure for these internet-connected devices.

  • Unauthenticated attackers can change charging station passwords.
  • These are internet-connected devices, making them potentially accessible.
  • Assess exposure to ensure operational security.

Attack Path

How an attacker could exploit the issue

An attacker with network access can target the web interface of the Mennekes Amtron charging station. By sending a specially crafted request to a specific endpoint, an unauthenticated attacker can bypass authentication and change the administrator password, gaining control over the device.

  • Requires network access.
  • Triggers via crafted POST request.
  • Leads to unauthorized administrative control.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated remote attacker to bypass authentication and change the password for the operator account on the affected charging station system. This could potentially disrupt legitimate operator access and control over the charging station's functions.

  • Operator account credentials.
  • Crafted POST request to `/operator/operator` endpoint.
  • Disruption of legitimate operator access.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Mennekes Amtron series, used for electric vehicle charging, presents a critical risk due to an authentication bypass vulnerability. This could allow unauthenticated remote attackers to reset user passwords. Ownership likely falls to the infrastructure or platform teams managing the charging stations, with initial steps involving asset discovery, confirming network reachability and business criticality, and identifying the accountable owner before planning remediation.

  • Identify and confirm affected assets.
  • Verify network exposure and criticality.
  • Plan remediation with asset owners.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is the Mennekes Amtron series?

The Mennekes Amtron series consists of electric vehicle (EV) charging stations. These devices are designed to provide power to EVs while often offering web-based administrative interfaces that allow owners or operators to monitor charging activity and manage device settings remotely.

What does CVE-2026-8979 mean?

This CVE describes a security weakness classified as CWE-287, or Improper Authentication. In plain terms, the software fails to verify who is trying to access the administrative controls. Because of this, an attacker can bypass the login process entirely to gain unauthorized access.

How is this authentication bypass triggered?

An attacker triggers the vulnerability by sending a specifically crafted POST request to the /operator/operator network endpoint. This does not require any prior login or special permissions. Requests that do not follow this specific format or target other areas of the system will not result in a password change.

Is my device at risk based on Halo Surface Signal?

Halo Surface Signal identifies these charging stations as internet-connected appliances. If your device is reachable via the public internet to enable remote management, it is considered externally exposed and potentially reachable by remote attackers.

What should I do if I manage these charging stations?

Begin by confirming if your specific units are running firmware version 5.22.3 or older. Locate the devices within your network, assess their current connectivity to ensure they are not unnecessarily exposed to the internet, and prepare to coordinate with your infrastructure team to plan for firmware updates.

References