ZDI-26-437: (Pwn2Own) Autel MaxiCharger AC Elite Home WebSockets Integer Underflow Remote Code Execution Vulnerability
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 ZDI has assigned a CVSS rating of 8.1. The following CVEs are assigned: CVE-2026-13308.
AI Analysis
Technical Summary
CVE-2026-13308 is a critical remote code execution vulnerability in the Autel MaxiCharger AC Elite Home EV charger. The issue arises from improper validation of user-supplied data in WebSocket message handling for the OCPP service, leading to an integer underflow before buffer allocation. This underflow can be exploited by remote attackers without authentication to execute arbitrary code in the device context. The vulnerability has a CVSS score of 8.1 and was responsibly disclosed to the vendor on 2026-03-19. Autel released a firmware update V1.40.81 that fixes this vulnerability.
Potential Impact
Exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected Autel MaxiCharger AC Elite Home devices without requiring authentication. This can lead to full compromise of the device, impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Apply the official firmware update V1.40.81 released by Autel to remediate this vulnerability. No other mitigations are specified or required once the firmware is updated.
ZDI-26-437: (Pwn2Own) Autel MaxiCharger AC Elite Home WebSockets Integer Underflow Remote Code Execution Vulnerability
Description
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 ZDI has assigned a CVSS rating of 8.1. The following CVEs are assigned: CVE-2026-13308.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-13308 is a critical remote code execution vulnerability in the Autel MaxiCharger AC Elite Home EV charger. The issue arises from improper validation of user-supplied data in WebSocket message handling for the OCPP service, leading to an integer underflow before buffer allocation. This underflow can be exploited by remote attackers without authentication to execute arbitrary code in the device context. The vulnerability has a CVSS score of 8.1 and was responsibly disclosed to the vendor on 2026-03-19. Autel released a firmware update V1.40.81 that fixes this vulnerability.
Potential Impact
Exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected Autel MaxiCharger AC Elite Home devices without requiring authentication. This can lead to full compromise of the device, impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Apply the official firmware update V1.40.81 released by Autel to remediate this vulnerability. No other mitigations are specified or required once the firmware is updated.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-437/","fetched":true,"fetchedAt":"2026-07-16T15:50:41.094Z","wordCount":198}
Threat ID: 6a58fe6468715ace43485b58
Added to database: 07/16/2026, 15:53:08 UTC
Last enriched: 07/16/2026, 15:54:24 UTC
Last updated: 07/16/2026, 17:28:38 UTC
Views: 4
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