Security readout for executives and security teams
Plain-English summary
CloudCharge cloudcharge.se has a critical authentication gap in its OCPP WebSocket interface. An attacker who can reach the endpoint and use a known or discovered charger identifier may impersonate a charging station and exchange commands or data as if legitimate.
Executive priority
Treat as urgent for any CloudCharge-managed charging network. The issue can affect operational control, billing or session data integrity, and trust in charger telemetry. Prioritize exposure reduction while seeking vendor guidance.
Technical view
CVE-2026-20781 is CWE-306: missing authentication for a critical function. The CVE describes unauthenticated access to OCPP WebSocket endpoints, enabling station impersonation, unauthorized command handling, privilege escalation, and corruption of charging-network data. CVSS is 9.4, network exploitable, low complexity, no privileges, and no user interaction.
Likely exposure
Organizations using CloudCharge cloudcharge.se, listed as affected in all versions, are potentially exposed where OCPP WebSocket endpoints are reachable by untrusted networks or actors who can learn station identifiers.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The described attack path is still serious: remote, unauthenticated, low-complexity access to charging infrastructure messaging.
Researcher notes
Evidence names CloudCharge cloudcharge.se, all versions, CVSS 3.1 score 9.4, vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L. No source-provided fixed version or active exploitation evidence is included in the bundle.
Mitigation direction
- Check CISA advisory ICSA-26-057-03 and CloudCharge support for current remediation guidance.
- Restrict access to OCPP WebSocket endpoints to trusted networks and known chargers.
- Apply any vendor-provided patch, configuration change, or authentication requirement when available.
- Monitor backend logs for duplicate, unknown, or geographically implausible station identifiers.
- Segment charging infrastructure management systems from public and corporate networks.
Validation and detection
- Inventory CloudCharge cloudcharge.se deployments and exposed OCPP WebSocket endpoints.
- Confirm whether endpoints require authentication before accepting charger communications.
- Review logs for unexpected station identifiers or source locations.
- Verify whether any vendor advisory names fixed versions or compensating controls.
- Check perimeter controls limiting endpoint reachability to authorized chargers.
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 lookupCVE-2026-20781 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
- Critical
- CVSS
- 9.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L3.95.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.4CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source materials
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.