CVE-2025-8754
highpriority · track · 0OT risk · elevatedEPSS 0.004 · 30 %ileCHEURUUSEPSS · scored 2026-10-28
Missing Authentication for Critical Function vulnerability in ABB ABB AbilityTM zenon.This issue affects ABB AbilityTM zenon: from 7.50 through 14.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedAbilityTM zenonabb_psirt
The issue has been corrected in the following ABB Ability™ zenon product versions: Version 11 build 400376, Version 12 build 407620 and Version 14 build 405141, where the respective patches have been successfully released. ABB recommends that customers upgrade to these patched versions at the earliest convenience. The updated versions are available through the zenon Update Manager (Versions 12 and 14). For Version 11, please contact zenon.support@abb.com.
- MitigationAbilityTM zenonabb_psirt
Refer to section “General security recommendations” for further advise on how to keep your system secure.
- WorkaroundAbilityTM zenonabb_psirt
- Restrict network access to systems with the ABB zenon Software Platform installed. - Ensure that access to a system is restricted by implementing access controls to minimize the risk of unauthorized access. - Assess the necessity of the ABB zenon Remote Transport functionality. - Ensure that if the Remote Transport functionality is not used, the zensyssrv.exe (ABB zenon System Service) is stopped or terminated. The zensyssrv.exe can also be stopped or terminated after authorized use to prevent this vulnerability.
- WorkaroundAbility Zenoncisa_csaf_ot
• Restrict network access to systems with the ABB Zenon Software Platform installed. - Ensure that access to a system is restricted by implementing access controls to minimize the risk of unauthorized access. • Assess the necessity of the ABB Zenon Remote Transport functionality. - Ensure that if the Remote Transport functionality is not used, the zensyssrv.exe (ABB Zenon System Service) is stopped or terminated. The zensyssrv.exe can also be stopped or terminated after authorized use to prevent this vulnerability.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- 2NGA002743ABB AbilityTM zenon Remote Transport Vulnerability2025-08-12csaf · abb_psirtCH
The vulnerability enables unauthorized access to the Reboot OS function within the Remote Transport Service, allowing an attacker to trigger a system reboot without the required authentication. This functionality initiates a system reboot on the target machine. However, remote exploitation of this vulnerability is not feasible unless the attacker has already gained access to the network where the affected ABB Ability™ zenon system is deployed. At the time of writing, there is no evidence that this vulnerability is being actively exploited in the wild.
- ICSA-26-146-03ABB Ability Zenon Remote Transport Vulnerability (Update A)2025-08-12icsa · cisa_csaf_otUS
ABB is aware of vulnerabilities in the product versions listed as affected in the advisory. The vulnerability enables unauthorized access to the Reboot OS function within the Remote Transport Service, allowing an attacker to trigger a system reboot without the required authentication. This functionality initiates a system reboot on the target machine. However, remote exploitation of this vulnerability is not feasible unless the attacker has already gained access to the network where the affected ABB Ability Zenon system is deployed. At the time of writing, there is no evidence that this vulnerability is being actively exploited in the wild.
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
- https://global.abb/group/enPatchcnnvd
- https://search.abb.com/library/Download.aspx?DocumentID=2NGA002743&LanguageCode=en&DocumentPartId=&Action=Launchcnnvd
- https://search.abb.com/library/Download.aspx?DocumentID=2NGA002743&LanguageCode=en&DocumentPartId=&Action=Launchenisa_euvd
- https://search.abb.com/library/Download.aspx?DocumentID=2NGA002743&LanguageCode=en&DocumentPartId=&Action=Launchnvd
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