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.

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Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Plugin Details

Severity: High

ID: 505938

File Name: tenable_ot_schneider_CVE-2026-6866.nasl

Version: 1.3

Type: Remote

Family: Tenable.ot

Published: 8/4/2026

Updated: 8/5/2026

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

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-6866

CWE: 1188

Detections

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