CVE-2026-1286

Schneider Electric EcoStruxure™ Foxboro DCS — vulnerability CVE-2026-1286

CWE-502: Deserialization of untrusted data vulnerability exists that could lead to loss of confidentiality, integrity and potential remote code execution on workstation when an admin authenticated user opens a malicious project file.

CVSS 6.5Patch available

This record: live connection— last retrieved: 7 November 2026 at 22:05.

Vendor

Schneider Electric

Product

EcoStruxure™ Foxboro DCS

up to version vers:generic/<CS8.1

Published

10 March 2026

Last modified

24 June 2026

Original source information

Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.

Technical description

CVSS 3.1 — vector details

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Attack vector

LOCAL

Privileges required

HIGH

User interaction

REQUIRED

Confidentiality

High

Integrity

High

Availability

High

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.4%

Percentile

33e

Source: FIRST.org, updated on 7 November 2026.

Patch information

Version CS 8.1 of EcoStruxure™ Foxboro DCS includes a fix for this vulnerability and is available through https://buyautomation.se.com/ CS 8.1 requires FX-V3 licenses, standard upgrade procedures apply. A reboot is required for workstations and servers. Depending on the existing system version, online upgrade without production interruption might be possible. We recommend you work with your local Field Service Representative or Technical Service Consultant for further information.

IACS Radar assessment

Our own interpretation and context for the source data above.

IACS Radar assessment

Our own interpretation and context for this vulnerability — not an official source.

IACS Radar priority score

49/ 100

Based on CVSS 6.5, EPSS 0.4%, industrial relevance 75/100.

Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.

Conditions for exploitation

•Local or adjacent access to the device is required.
•Limited user privileges are required.
•User interaction (for example opening a file) is required.

Operational impact & energy relevance

Possible loss of visibility of or control over the process upon successful exploitation.

Assessed as relevant to the energy sector based on: Vermeld in een officiële CISA ICS Advisory, wat directe relevantie voor industriële besturingssystemen bevestigt. Productbeschrijving komt overeen met de categorie "DCS", een typisch OT/ICS-componenttype. Vendor "Schneider Electric" is a known supplier of equipment for the energy sector.

Recommended defensive measures

•Apply the latest firmware or software update and validate its integrity.
•Restrict network access to the affected device to a dedicated OT management segment.
•Implement network segmentation in line with zones and conduits (IEC 62443-3-2).
•Monitor for abnormal protocol traffic using an OT-aware detection system.

Industrial relevance score

75/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Product description matches the category "DCS", a typical OT/ICS component type.
• Vendor "Schneider Electric" is a known supplier of equipment for the energy sector.

Automatically classified as industrially relevant based on CISA/NVD signals (see reasons).

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.

IEC 62443 mapping

IEC 62443-4-1FR3 · Systeemintegriteit

Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.

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