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.
Exploitability
AV:LAC:LAT:PPR:LUI:NVulnerable System
VC:HVI:HVA:HSubsequent System
SC:NSI:NSA:N7.3/CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NOther