CVE-2026-4869
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
Product
InstallShield
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-426CWE-426
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Flexera InstallShield | v ≤ 2025 R2 | — |
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