A potential elevated privilege issue has been reported with InstallShield built Standalone MSI setups having multiple InstallScript custom actions configured. All supported versions (InstallShield 2023 R2, InstallShield 2022 R2 and InstallShield 2021 R2) are affected by this issue.
The product creates a temporary file in a directory whose permissions allow unintended actors to determine the file’s existence or otherwise access that file.