CVE-2026-6900 PUBLISHED

Improper Certificate Validation

Assigner: ABB
Reserved: 23.04.2026 Published: 06.07.2026 Updated: 06.07.2026

Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL.

This issue affects APROL: before R 4.4-01P5.

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 7.4

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 9.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Vendor	B&R Industrial Automation GmbH
Product	APROL
Versions	Default: unaffected affected from 0 to R 4.4-01P5 (excl.)