Schneider Electric SCADAPack and RemoteConnect Improper Check For Unusual or Exceptional Conditions (CVE-2026-0667)

critical Tenable OT Security Plugin ID 505939

Synopsis

The remote OT asset is affected by a vulnerability.

Description

CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause remote code execution, denial of service, and loss of confidentiality and integrity of the RTU controller when an unauthenticated attacker sends specially crafted Modbus TCP packets to the device.

This plugin only works with Tenable.ot.
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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: Critical

ID: 505939

File Name: tenable_ot_schneider_CVE-2026-0667.nasl

Version: 1.3

Type: Remote

Family: Tenable.ot

Published: 8/6/2026

Updated: 8/7/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.16

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:scadapack_47x_firmware, cpe:/o:schneider-electric:scadapack_47xi_firmware, cpe:/o:schneider-electric:scadapack_57x_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 2/10/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-0667

CWE: 754

ICSA: 26-076-02

Detections

Analytics