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 (CVE-2026-4156) affects ChargePoint Home Flex version 5.5.4.13 and involves a stack-based buffer overflow in the processing of OCPP getpreq messages. Due to insufficient validation of input length, an attacker can overflow a fixed-size stack buffer, leading to remote code execution as root. The attack vector is network-adjacent and does not require user authentication. The CVSS v3.0 base score is 7.5, indicating high severity. No patch or official remediation level has been published by the vendor, and the product is not a cloud service, so remediation depends on vendor updates.
Potential Impact
Successful exploitation allows an unauthenticated, network-adjacent attacker to execute arbitrary code with root privileges on affected ChargePoint Home Flex EV chargers. This compromises confidentiality, integrity, and availability of the device. Given the root-level code execution, full system compromise is possible. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround is currently available, organizations should monitor vendor communications for updates. Until a fix is released, restricting network access to the affected device and isolating it from untrusted networks may reduce exposure.
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 (CVE-2026-4156) affects ChargePoint Home Flex version 5.5.4.13 and involves a stack-based buffer overflow in the processing of OCPP getpreq messages. Due to insufficient validation of input length, an attacker can overflow a fixed-size stack buffer, leading to remote code execution as root. The attack vector is network-adjacent and does not require user authentication. The CVSS v3.0 base score is 7.5, indicating high severity. No patch or official remediation level has been published by the vendor, and the product is not a cloud service, so remediation depends on vendor updates.
Potential Impact
Successful exploitation allows an unauthenticated, network-adjacent attacker to execute arbitrary code with root privileges on affected ChargePoint Home Flex EV chargers. This compromises confidentiality, integrity, and availability of the device. Given the root-level code execution, full system compromise is possible. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround is currently available, organizations should monitor vendor communications for updates. Until a fix is released, restricting network access to the affected device and isolating it from untrusted networks may reduce exposure.
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: 4/11/2026, 1:21:17 AM
Last updated: 4/11/2026, 6:05:10 AM
Views: 8
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