CVE-2026-6900

B&R Industrial Automation GmbH APROL — kwetsbaarheid CVE-2026-6900

Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL. This issue affects APROL: before R 4.4-01P5.

CVSS 7.4Patch available

This record: live connection— last retrieved: 24 September 2026 at 05:11.

Vendor

B&R Industrial Automation GmbH

Product

APROL

up to version <R 4.4-01P5

Published

6 July 2026

Last modified

6 July 2026

Original source information

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

Technical description

Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL. This issue affects APROL: before R 4.4-01P5.

CVSS 3.1 — vector details

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

Attack vector

NETWORK

Privileges required

NONE

User interaction

NONE

Confidentiality

High

Integrity

High

Availability

None

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.2%

Percentile

13e

Source: FIRST.org, updated on 23 September 2026.

Patch information

The problem is corrected in the following product versions: - APROL >= R 4.4-01P5 B&R recommends that customers apply the update at earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

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

45/ 100

Based on CVSS 7.4, EPSS 0.2%, industrial relevance 55/100.

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

•Network access to the affected device or segment is required.
•No valid credentials are needed.
•No user interaction required.

Operational impact & energy relevance

Limited impact on availability; the risk lies mainly with confidentiality or integrity of process data.

Assessed as relevant to the energy sector based on: Vermeld in een officiële CISA ICS Advisory, wat directe relevantie voor industriële besturingssystemen bevestigt. Vendor "B&R Industrial Automation GmbH" is a known supplier of equipment for the energy sector.

Recommended defensive measures

•Encrypt sensitive configuration and management communication.
•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

55/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Vendor "B&R Industrial Automation GmbH" is a known supplier of equipment for the energy sector.

Classification is provisional; manual verification by an OT security analyst is recommended.

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 24 September 2026.

IEC 62443 mapping

IEC 62443-4-2FR4 · Vertrouwelijkheid van gegevens

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

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