How severe is CVE-2026-26288?

CVE-2026-26288 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-26288 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26288?

CVE-2026-26288 affects Everon Api.everon.io. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26288?

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

Does CVE-2026-26288 have an EU (EUVD) identifier?

Yes. CVE-2026-26288 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10035.

When was CVE-2026-26288 published?

CVE-2026-26288 was published on 2026-03-06 and last updated on 2026-06-17.

CVE-2026-26288

CVE-2026-26288 is a critical-severity vulnerability in Everon Api.everon.io with a CVSS 3.x base score of 9.4. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.4)
CVSS v4: 9.3
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10035
Weakness: CWE-306
Affected product: Everon Api.everon.io
Published: 2026-03-06
Last modified: 2026-06-17

Description

WebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station impersonation and manipulate data sent to the backend. An unauthenticated attacker can connect to the OCPP WebSocket endpoint using a known or discovered charging station identifier, then issue or receive OCPP commands as a legitimate charger. Given that no authentication is required, this can lead to privilege escalation, unauthorized control of charging infrastructure, and corruption of charging network data reported to the backend.

Frequently asked questions

What is CVE-2026-26288?: WebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station impersonation and manipulate data sent to the backend. An unauthenticated attacker can connect to the OCPP WebSocket endpoint using a known or discovered charging station identifier, then issue or receive OCPP commands as a legitimate charger. Given that no authentication is required, this can lead to privilege escalation, unauthorized control of charging infrastructure, and corruption of charging network data reported to the backend.
How severe is CVE-2026-26288?: CVE-2026-26288 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-26288 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26288?: CVE-2026-26288 affects Everon Api.everon.io. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26288?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-26288 have an EU (EUVD) identifier?: Yes. CVE-2026-26288 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10035.
When was CVE-2026-26288 published?: CVE-2026-26288 was published on 2026-03-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:everon:api.everon.io:*:*:*:*:*:*:*:*

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