In Phoenix SCT WinFlash 188.8.131.52 through 184.108.40.206, the included drivers could be used by a malicious Windows application to gain elevated privileges. Adverse impacts are limited to the Windows environment and there is no known direct impact to the UEFI firmware. This was fixed in late June 2019.
CVSS 3.x Severity and Metrics:
CVSS 2.0 Severity and Metrics: