CVE-2026-4869 Potential Privilege Escalation in InstallShield
Local administrators launching compressed setups from insecure locations may inadvertently execute malicious prerequisites, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-4869?
CVE-2026-4869 is a medium-severity vulnerability in Flexera InstallShield, published on 13 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-426
Which versions are affected by CVE-2026-4869?
How do I fix CVE-2026-4869?
No fix has been published for CVE-2026-4869 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4869 being exploited?
There is no known exploitation of CVE-2026-4869 in the wild and no public exploit code.
Sources
Also known as GHSA-g542-fwh7-jvc6.