Quick answers
- Is CVE-2025-8754 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-8754 being exploited in the wild.
- How severe is CVE-2025-8754?
- High severity, with a CVSS score of 7.5, published 26 May 2026.
- Which products and versions are affected?
- ABB Ability zenon 7.50 to 14.
- Is there a fix for CVE-2025-8754?
- 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-2025-8754 attacked?
- It is attacked over the network.
- Am I affected by CVE-2025-8754?
- Check whether you run ABB Ability zenon 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 'Missing Authentication for Critical Function' vulnerability (CWE-306) exists in the ABB zenon Remote Transport Service (zensyssrv.exe). While the service typically requires a pre-configured password, a flaw allows an unauthenticated attacker with network access to the system to bypass these checks and invoke the 'Reboot OS' function. This is a network-based attack that requires no user interaction or prior privileges. Successful exploitation results in a complete loss of availability for the target machine. ABB recommends restricting network access or disabling the zensyssrv.exe service if remote transport functionality is not required.
Affected products
- ABB Ability zenon 7.50 to 14
Timeline
- 2025-08-12: advisory: Initial ABB PSIRT advisory release
- 2026-05-26: advisory: CISA republication of advisory ICSA-26-146-03