ZDI-26-435: (Pwn2Own) Autel MaxiCharger AC Elite Home NFC Stack-based Buffer Overflow Arbitrary Code Execution Vulnerability
This vulnerability allows physically present 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 ZDI has assigned a CVSS rating of 6.8. The following CVEs are assigned: CVE-2026-13309.
AI Analysis
Technical Summary
CVE-2026-13309 is a stack-based buffer overflow vulnerability in the NFC card response handling of the Autel MaxiCharger AC Elite Home EV charger. An attacker with physical access can exploit this flaw without authentication by providing a maliciously crafted NFC card response, causing a fixed-length stack buffer to overflow and enabling arbitrary code execution within the device context. The vulnerability was reported to the vendor on 2026-03-19 and publicly disclosed on 2026-07-15. The vendor addressed the issue in firmware version V1.40.81.
Potential Impact
Successful exploitation allows an attacker with physical access to execute arbitrary code on the affected EV charger without requiring authentication. This could lead to full control of the device, potentially impacting device operation and safety. The CVSS score of 6.8 indicates a medium severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Autel MaxiCharger AC Elite Home EV charger firmware to version V1.40.81 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
ZDI-26-435: (Pwn2Own) Autel MaxiCharger AC Elite Home NFC Stack-based Buffer Overflow Arbitrary Code Execution Vulnerability
Description
This vulnerability allows physically present 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 ZDI has assigned a CVSS rating of 6.8. The following CVEs are assigned: CVE-2026-13309.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-13309 is a stack-based buffer overflow vulnerability in the NFC card response handling of the Autel MaxiCharger AC Elite Home EV charger. An attacker with physical access can exploit this flaw without authentication by providing a maliciously crafted NFC card response, causing a fixed-length stack buffer to overflow and enabling arbitrary code execution within the device context. The vulnerability was reported to the vendor on 2026-03-19 and publicly disclosed on 2026-07-15. The vendor addressed the issue in firmware version V1.40.81.
Potential Impact
Successful exploitation allows an attacker with physical access to execute arbitrary code on the affected EV charger without requiring authentication. This could lead to full control of the device, potentially impacting device operation and safety. The CVSS score of 6.8 indicates a medium severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Autel MaxiCharger AC Elite Home EV charger firmware to version V1.40.81 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-435/","fetched":true,"fetchedAt":"2026-07-16T15:50:45.874Z","wordCount":188}
Threat ID: 6a58fe6468715ace43485b5e
Added to database: 07/16/2026, 15:53:08 UTC
Last enriched: 07/16/2026, 15:54:42 UTC
Last updated: 07/16/2026, 20:04:37 UTC
Views: 4
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