High severity7.5NVD Advisory· Published Feb 26, 2021· Updated Jun 17, 2026
CVE-2020-24686
CVE-2020-24686
Description
The vulnerabilities can be exploited to cause the web visualization component of the PLC to stop and not respond, leading to genuine users losing remote visibility of the PLC state. If a user attempts to login to the PLC while this vulnerability is exploited, the PLC will show an error state and refuse connections to Automation Builder. The execution of the PLC application is not affected by this vulnerability. This issue affects ABB AC500 V2 products with onboard Ethernet.
Affected products
8- ABB/AC500 V2 products with onboard Ethernetv5Range: All
- cpe:2.3:o:abb:pm554_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:abb:pm556_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:abb:pm564_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:abb:pm566_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:abb:pm572_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:abb:pm573_firmware:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- search.abb.com/library/Download.aspxnvdVendor Advisory
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