Unauthenticated OCPP WebSocket access enables impersonation/control of chargers across networks; potential widespread disruption of charging infrastructure.
CVE-2026-25851
Unauthenticated OCPP WebSocket allows charging-station impersonation and control.
Is CVE-2026-25851 being exploited?
Not confirmed. CVE-2026-25851 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.64% probability of exploitation in the next 30 days.
How severe is CVE-2026-25851?
CVE-2026-25851 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-25851?
Not known from our data. No patch reference has been recorded for CVE-2026-25851, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-25851 affect?
CVE-2026-25851 affects OCPP WebSocket endpoints, OCPP-enabled charging stations, Charging backend servers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-25851?
Enforce authentication/token-based authorization on OCPP WebSocket endpoints.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can impersonate chargers, issue/receive OCPP commands, escalate access, and corrupt backend data.
Immediate action required
- affectedAll versions
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.