Schneider Electric EcoStruxure Panel Server Initialization of a Resource with an Insecure Default (CVE-2026-6866)

high Tenable OT Security Plugin ID 505938

Synopsis

The remote OT asset is affected by a vulnerability.

Description

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.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 505938

File Name: tenable_ot_schneider_CVE-2026-6866.nasl

Version: 1.1

Type: Remote

Family: Tenable.ot

Published: 8/4/2026

Updated: 8/4/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vulnerability Information

CPE: cpe:/o:schneider-electric:ecostruxure_panel_server_pas400_firmware, cpe:/o:schneider-electric:ecostruxure_panel_server_pas600_firmware, cpe:/o:schneider-electric:ecostruxure_panel_server_pas600v2_firmware, cpe:/o:schneider-electric:ecostruxure_panel_server_pas800_firmware, cpe:/o:schneider-electric:ecostruxure_panel_server_pas800v2_firmware

Required KB Items: Tenable.ot/Schneider

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-6866

CWE: 1188

Detections

Analytics