CVE Catalog

CVE-2026-4869

MediumCVSS 5.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.11%

1th percentile - higher than 1% of all known CVEs

Summary

InstallShield version 2025 R2 and earlier has a potential privilege escalation issue when running a compressed Basic MSI setup with Prerequisites from an insecure location. If a local administrator launches Setup.exe with Prerequisites from an unsecured location, the Prerequisite installers may also load from an unsecured location, potentially leading to privilege escalation.

Risk Assessment

A local attacker can replace prerequisite files and cause code execution with higher privileges. The risk occurs when the installer is run from an untrusted location.

Recommendation

Upgrade InstallShield to a version later than 2025 R2. Avoid running compressed installers from insecure locations.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS