CVE-2020-24686

HIGH

ABB AC500 V2 - Denial of Service in Web Visualization Component

Title source: llm
STIX 2.1

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.

References (1)

Core 1

Scores

CVSS v3 7.5
EPSS 0.0085
EPSS Percentile 75.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-400
Status published
Products (6)
abb/pm554_firmware
abb/pm556_firmware
abb/pm564_firmware
abb/pm566_firmware
abb/pm572_firmware
abb/pm573_firmware
Published Feb 26, 2021
Tracked Since Feb 18, 2026