CVE-2020-24686: Abb PM554 Firmware

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

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

• Abb PM554 Firmware: affected versions not specified
• Abb PM556 Firmware: affected versions not specified
• Abb PM564 Firmware: affected versions not specified
• Abb PM566 Firmware: affected versions not specified
• Abb PM572 Firmware: affected versions not specified
• Abb PM573 Firmware: affected versions not specified

Published 2021-02-26. Last modified 2026-06-17.