CVE-2021-27420

Name of the Vulnerable Software and Affected Versions GE UR firmware versions prior to 8.1x

Description The web server task in the affected firmware does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. However, the relay remains effective in all other functionality and communication channels.

Recommendations For GE UR firmware versions prior to 8.1x, update to version 8.1x or later to resolve the issue. As a temporary workaround, consider restricting access to the web server to minimize the risk of exploitation.