Security readout for executives and security teams
Plain-English summary
CVE-2026-0778 affects Enel X JuiceBox 40 charging stations, reported for version 4.2.7. A telnet service on TCP port 2000 accepts connections without authentication, allowing a nearby network attacker to run code on the device. This could affect confidentiality, integrity, and availability of charging infrastructure.
Executive priority
Treat as a high-priority infrastructure exposure if JuiceBox 40 units are deployed. Prioritize confirming device inventory and network reachability. Business urgency increases where chargers share networks with corporate systems, facilities systems, or guest Wi-Fi.
Technical view
The flaw is CWE-306: missing authentication for a critical function. ZDI states the JuiceBox 40 telnet service listens on TCP/2000 by default and permits unauthenticated remote connections. A network-adjacent attacker can execute arbitrary code in the service account context. CVSS 3.0 is 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Likely exposure
Exposure is highest where JuiceBox 40 devices are reachable from untrusted local, Wi-Fi, building, or operations networks. The CVSS vector is adjacent network, so sources do not indicate internet-wide reach unless organizations have exposed TCP/2000 beyond local segments.
Exploitation context
Authentication is not required, user interaction is not required, and attack complexity is low. CISA KEV is not indicated in the provided data, and the sources provided do not state active exploitation. The advisory identifies ZDI-CAN-23285 as the originating case.
Researcher notes
The public record names Enel X JuiceBox 40 version 4.2.7 and describes unauthenticated RCE via telnet on TCP/2000. No patch details, broader version range, or active exploitation evidence are included in the provided sources. Avoid assuming other JuiceBox models are affected without vendor confirmation.
Mitigation direction
- Check Enel X or device operator guidance for firmware updates or official mitigations.
- Restrict access to TCP port 2000 to trusted management networks only.
- Segment EV charging stations from corporate and guest networks.
- Disable unnecessary remote services if supported by vendor documentation.
- Monitor for unexpected connections to JuiceBox devices on TCP/2000.
Validation and detection
- Inventory Enel X JuiceBox 40 devices and confirm firmware versions.
- Identify whether version 4.2.7 is deployed.
- Confirm whether TCP/2000 is reachable from adjacent or untrusted networks.
- Review firewall, VLAN, and wireless segmentation around charging infrastructure.
- Check vendor advisories for updated affected versions and remediation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-0778 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ZDI-26-041CVE reference · x_research-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.