CVE-2026-4156 ChargePoint CVE debrief

Who should care

Defenders responsible for ChargePoint Home Flex EV charger installations should assess exposure and prioritize verification and potential firmware updates. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Additionally, defenders should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Why it matters

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected ChargePoint Home Flex EV charger installations. Defenders should prioritize verifying exposure and assessing the need for firmware updates to mitigate potential risks.

• Potential for remote code execution
• Need for firmware updates to mitigate vulnerability
• Importance of verifying exposure of affected chargers

Technical summary

The vulnerability exists within the handling of OCPP messages in ChargePoint Home Flex EV chargers. It is caused by the lack of proper validation of user-supplied data length prior to copying it to a fixed-length stack-based buffer, allowing network-adjacent attackers to execute arbitrary code. The vulnerability has a CVSS score of 7.5 and is considered a HIGH severity vulnerability. The CVE record and NVD entry provide additional details on the vulnerability, including its potential impact and affected systems. Defenders should prioritize verifying exposure of ChargePoint Home Flex EV chargers and assessing the need for firmware updates.

Defensive priority

Defenders should prioritize verifying exposure of ChargePoint Home Flex EV chargers and assessing the need for firmware updates.

Recommended defensive actions

• Verify exposure of ChargePoint Home Flex EV chargers
• Assess the need for firmware updates
• Implement network controls to restrict access to affected chargers
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its existence within the handling of OCPP messages and the potential for arbitrary code execution. The vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of ChargePoint Home Flex EV chargers. 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.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.