CVE-2026-4156: CWE-121: Stack-based Buffer Overflow in ChargePoint Home Flex
ChargePoint Home Flex OCPP getpreq Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of ChargePoint Home Flex EV chargers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OCPP messages. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-26339.
AI Analysis
Technical Summary
This vulnerability in ChargePoint Home Flex EV chargers arises from a stack-based buffer overflow in the processing of OCPP getpreq messages. The flaw is caused by insufficient validation of input length before copying data into a fixed-length stack buffer, enabling remote code execution as root by an unauthenticated, network-adjacent attacker. The CVSS 3.0 base score is 7.5, reflecting high impact on confidentiality, integrity, and availability. The affected version is 5.5.4.13. There is no vendor advisory or patch available at this time.
Potential Impact
Successful exploitation allows an unauthenticated attacker with network adjacency to execute arbitrary code with root privileges on the affected ChargePoint Home Flex device. This compromises the device's confidentiality, integrity, and availability, potentially allowing full control over the EV charger.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to the affected device to trusted sources only and monitor for unusual activity. Avoid exposing the device to untrusted networks.
CVE-2026-4156: CWE-121: Stack-based Buffer Overflow in ChargePoint Home Flex
Description
ChargePoint Home Flex OCPP getpreq Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of ChargePoint Home Flex EV chargers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OCPP messages. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-26339.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in ChargePoint Home Flex EV chargers arises from a stack-based buffer overflow in the processing of OCPP getpreq messages. The flaw is caused by insufficient validation of input length before copying data into a fixed-length stack buffer, enabling remote code execution as root by an unauthenticated, network-adjacent attacker. The CVSS 3.0 base score is 7.5, reflecting high impact on confidentiality, integrity, and availability. The affected version is 5.5.4.13. There is no vendor advisory or patch available at this time.
Potential Impact
Successful exploitation allows an unauthenticated attacker with network adjacency to execute arbitrary code with root privileges on the affected ChargePoint Home Flex device. This compromises the device's confidentiality, integrity, and availability, potentially allowing full control over the EV charger.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to the affected device to trusted sources only and monitor for unusual activity. Avoid exposing the device to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- zdi
- Date Reserved
- 2026-03-13T20:34:05.267Z
- Cvss Version
- 3.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d99e6e1cc7ad14da1225b6
Added to database: 4/11/2026, 1:05:50 AM
Last enriched: 4/18/2026, 2:33:12 PM
Last updated: 5/26/2026, 1:35:59 PM
Views: 67
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