[ CVE-2026-4869 · Published 13 Oct 2026 ]
Vulnerability in Flexera InstallShield
CVSS 5.4
EPSS <1%No fix listed yet
[ Description ]Official description
A potential privilege escalation issue was identified in InstallShield version 2025 R2 and earlier when running compressed Basic MSI setup with Prerequisites from an insecure location. If a local administrator launches a compressed Setup.exe with Prerequisites from an unsecured location, the Prerequisite installers also might load from an unsecured location, potentially leading to privilege escalation.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.