How severe is CVE-2026-4156?

CVE-2026-4156 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4156?

CVE-2026-4156 affects Chargepoint Home Flex Cph50 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-4156 have an EU (EUVD) identifier?

Yes. CVE-2026-4156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21641.

When was CVE-2026-4156 published?

CVE-2026-4156 was published on 2026-04-11 and last updated on 2026-06-17.

CVE-2026-4156

CVE-2026-4156 is a high-severity vulnerability in Chargepoint Home Flex Cph50 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21641
Weakness: CWE-121
Affected product: Chargepoint Home Flex Cph50 Firmware
Published: 2026-04-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-4156?: 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.
How severe is CVE-2026-4156?: CVE-2026-4156 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4156?: CVE-2026-4156 affects Chargepoint Home Flex Cph50 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-4156 have an EU (EUVD) identifier?: Yes. CVE-2026-4156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21641.
When was CVE-2026-4156 published?: CVE-2026-4156 was published on 2026-04-11 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:chargepoint:home_flex_cph50_firmware:*:*:*:*:*:*:*:*

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