(Pwn2Own) Autel MaxiCharger AC Elite Home WebSockets Integer Underflow Remote Code Execution Vulnerability

July 15th, 2026
ZDI-26-437 ZDI-CAN-29113

CVE ID

CVE-2026-13308

CVSS Score

8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Autel

Affected Products

MaxiCharger AC Elite Home

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Autel MaxiCharger AC Elite Home EV chargers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of WebSocket messages related to the OCPP service. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

Additional Details

Fixed in firmware version V1.40.81


Disclosure Timeline

  • 2026-03-19 - Vulnerability reported to vendor
  • 2026-07-15 - Coordinated public release of advisory
  • 2026-07-15 - Advisory Updated

Credit

Ryo Kato

Back to Advisories