CVE-2020-27383: Blizzard Battle.net

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Battle.net.exe in Battle.Net 1.27.1.12428 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability exist due to weak set of permissions being granted to the "Authenticated Users Group" which grants the (F) Flag aka "Full Control"

Affected products

• Blizzard Battle.net: version 1.27.1.12428 only

Published 2021-06-09. Last modified 2026-06-17.