Quick answers
- Is CVE-2026-6900 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-6900 being exploited in the wild.
- How severe is CVE-2026-6900?
- High severity, with a CVSS score of 7.4, published 6 July 2026.
- Which products and versions are affected?
- B&R Industrial Automation APROL before R 4.4-01P5.
- Is there a fix for CVE-2026-6900?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-6900 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-6900?
- Check whether you run B&R Industrial Automation APROL at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability classified as Improper Certificate Validation (CWE-295) exists in B&R Industrial Automation GmbH APROL versions prior to R 4.4-01P5. The software fails to adequately validate the authenticity of digital certificates during secure communications. An unauthenticated remote attacker could exploit this by performing a man-in-the-middle (MitM) attack to intercept, decrypt, or alter encrypted traffic between the APROL system and other endpoints. While the attack requires a specific network position (High Attack Complexity), a successful exploit results in high impacts to confidentiality and integrity. Users are advised to upgrade to version R 4.4-01P5 or later.
Affected products
- B&R Industrial Automation GmbH APROL before R 4.4-01P5
Timeline
- 2026-07-06: advisory: Initial advisory published by ABB/B&R Industrial Automation
- 2026-07-06: disclosed: CVE-2026-6900 published to NVD