Is CVE-2026-4156 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-4156 being exploited in the wild.

How severe is CVE-2026-4156?

High severity, with a CVSS score of 7.5, published 11 April 2026.

Which products and versions are affected?

ChargePoint Home Flex CPH50 firmware versions prior to 5.5.4.22.

Is there a fix for CVE-2026-4156?

A patch was published on 2026-03-16: Coordinated public release of advisory and fix in version 5.5.4.22 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-4156 attacked?

It is attacked from the adjacent network, in a network appliance.

Am I affected by CVE-2026-4156?

Check whether you run Chargepoint Home Flex Cph50 or Chargepoint Home Flex Cph50 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-4156: ChargePoint Home Flex stack overflow in OCPP getpreq

CVE-2026-4156 · Severity: high · CVSS 7.5 · Published 2026-04-11

A security vulnerability exists in ChargePoint Home Flex electric vehicle chargers, which are used for residential EV charging. An attacker on the same local network could exploit this flaw to take full control of the charger without needing a password. This could lead to unauthorized access to the device's functions, potential service disruption, or use of the charger as a foothold to attack other devices on the home network.

Technologies: Chargepoint Home Flex Cph50, Chargepoint Home Flex Cph50 Firmware. Vendors: Chargepoint.

Quick answers

Is CVE-2026-4156 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-4156 being exploited in the wild.
How severe is CVE-2026-4156?: High severity, with a CVSS score of 7.5, published 11 April 2026.
Which products and versions are affected?: ChargePoint Home Flex CPH50 firmware versions prior to 5.5.4.22.
Is there a fix for CVE-2026-4156?: A patch was published on 2026-03-16: Coordinated public release of advisory and fix in version 5.5.4.22 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-4156 attacked?: It is attacked from the adjacent network, in a network appliance.
Am I affected by CVE-2026-4156?: Check whether you run Chargepoint Home Flex Cph50 or Chargepoint Home Flex Cph50 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow vulnerability (CWE-121) exists in the ChargePoint Home Flex CPH50 firmware within the handling of Open Charge Point Protocol (OCPP) messages. The 'getpreq' component fails to properly validate the length of user-supplied data before copying it into a fixed-length stack buffer. A network-adjacent attacker can exploit this flaw without authentication to execute arbitrary code with root privileges. The vulnerability was addressed in firmware version 5.5.4.22.

Affected products

ChargePoint Home Flex CPH50 firmware versions prior to 5.5.4.22

Timeline

2025-03-06: disclosed: Vulnerability reported to vendor via Pwn2Own
2026-03-16: patched: Coordinated public release of advisory and fix in version 5.5.4.22
2026-04-11: advisory: NVD publication date

References

https://www.zerodayinitiative.com/advisories/ZDI-26-196/

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