CVE intelligence and bounded remediation

CVE-2026-6866 — Schneider-Electric Ecostruxure Panel Server Pas400 Firmware security vulnerability

High CVSS 8.2

CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials revert to initial settings in rare circumstances, enabling unauthorized authentication using known credentials.

Severity
High
CVSS
8.2 (4.0)
Published
2026-05-12
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-1188

Affected products

  • schneider-electric / ecostruxure_panel_server_pas400_firmware
  • schneider-electric / ecostruxure_panel_server_pas600_firmware
  • schneider-electric / ecostruxure_panel_server_pas600v2_firmware
  • schneider-electric / ecostruxure_panel_server_pas800_firmware
  • schneider-electric / ecostruxure_panel_server_pas800v2_firmware

Matched remediation archetype

Information disclosure and sensitive data exposure

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace sensitive data through responses, errors, logs, metrics, traces, caches, exports, files, backups, and client bundles.
  • Identify affected subjects, tenants, retention windows, access controls, and downstream copies without opening unnecessary sensitive records.
  • Review metadata, timing, status, length, and existence signals as well as direct content disclosure.

Remediate safely

  • Minimize collection and output, apply field-level authorization and redaction at a centralized boundary, and return generic external errors.
  • Remove secrets and sensitive data from logs, artifacts, URLs, caches, and client-side bundles; rotate credentials that may have been exposed.
  • Update the affected component and add synthetic-data tests for response, error, observability, and export paths.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.