CVE-2026-4156 ChargePoint Home Flex OCPP getpreq Stack-based Buffer Overflow Remote Code Execution Vulnerability
Network-adjacent attackers can execute arbitrary code as root on ChargePoint Home Flex EV chargers via a stack-based buffer overflow in OCPP message handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4156?
CVE-2026-4156 is a high-severity memory corruption vulnerability in ChargePoint Home Flex, published on 11 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-4156?
It affects 1 product.
Products include Chargepoint Home Flex Cph50 Firmware.
How do I fix CVE-2026-4156?
No fix has been published for CVE-2026-4156 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-4156 being exploited?
There is no known exploitation of CVE-2026-4156 in the wild and no public exploit code.
Other vulnerabilities in ChargePoint Home Flex
Sources
Also known as GHSA-93fc-f6pw-cp83.