Vulnerability · Published Feb 26, 2021 · Assigned by ABB
CVE-2020-24686AC500 V2 webserver denial of service vulnerability
High 7.5
In plain English
A high-severity uncontrolled resource consumption in AC500 V2 products with onboard Ethernet from ABB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ABB | AC500 V2 products with onboard Ethernet | All |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H