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 handling of card responses via the NFC interface on Autel MaxiCharger AC Elite Home EV chargers. An attacker with physical access can exploit this flaw by providing a crafted NFC card response that overflows a fixed-length stack buffer, enabling arbitrary code execution in the device context. No authentication is required for exploitation. The vulnerability was reported to the vendor on March 19, 2026, and publicly disclosed on July 15, 2026. It is fixed in firmware version 1.40.81.
Potential Impact
Successful exploitation allows an attacker with physical access to execute arbitrary code on the affected EV charger, potentially compromising device integrity, confidentiality, and availability. The vulnerability has a CVSS base score of 6.8, indicating a medium severity impact with high confidentiality, integrity, and availability consequences.
Mitigation Recommendations
Apply the official firmware update to version 1.40.81 or later to remediate this vulnerability. This update fixes the stack-based buffer overflow in the NFC interface. Until the update is applied, restrict physical access to the device to prevent exploitation.
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 handling of card responses via the NFC interface on Autel MaxiCharger AC Elite Home EV chargers. An attacker with physical access can exploit this flaw by providing a crafted NFC card response that overflows a fixed-length stack buffer, enabling arbitrary code execution in the device context. No authentication is required for exploitation. The vulnerability was reported to the vendor on March 19, 2026, and publicly disclosed on July 15, 2026. It is fixed in firmware version 1.40.81.
Potential Impact
Successful exploitation allows an attacker with physical access to execute arbitrary code on the affected EV charger, potentially compromising device integrity, confidentiality, and availability. The vulnerability has a CVSS base score of 6.8, indicating a medium severity impact with high confidentiality, integrity, and availability consequences.
Mitigation Recommendations
Apply the official firmware update to version 1.40.81 or later to remediate this vulnerability. This update fixes the stack-based buffer overflow in the NFC interface. Until the update is applied, restrict physical access to the device to prevent exploitation.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-435/","fetched":true,"fetchedAt":"2026-07-16T15:50:45.874Z","wordCount":188}
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a58fe6468715ace43485b5e
Added to database: 07/16/2026, 15:53:08 UTC
Last enriched: 08/07/2026, 06:03:00 UTC
Last updated: 08/27/2026, 10:52:07 UTC
Views: 64
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