Is CVE-2026-4156 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-4156, but active exploitation has not been confirmed.

Can CVE-2026-4156 be exploited remotely?

Partially. CVE-2026-4156 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-4156?

CVE-2026-4156 has a CVSS score of 7.5 (HIGH).

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HIGHPOC

CVE-2026-4156

CWE-121Published: April 11, 2026· Updated: Apr 13, 2026

7.5

CVSS v3.1

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.

NVD Source

Technical Analysis

CVE-2026-4156 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.5.

A proof-of-concept (PoC) exploit exists for CVE-2026-4156. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.