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TI-2026-71752 Aliases CVE-2026-4869GHSA-g542-fwh7-jvc6

Privilege escalation in Flexera InstallShield from insecure locations

Priority LOW 25CWE-426Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-426.

Summary

Flexera InstallShield through 2025 R2 is affected. Prerequisite installers in a compressed Basic MSI setup can load from an insecure location because of an untrusted search path (CWE-426). A local user with low privileges could gain elevated privileges when a local administrator runs a compressed Setup.exe with Prerequisites from an unsecured location.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00112 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FlexeraInstallShieldup to 2025 R2—No fix listedCNA
  • InstallShield VendorFlexera Affected up to 2025 R2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for InstallShield. Run compressed Setup.exe with Prerequisites only from a secured location.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-4869
  2. 2026-10-13 Alias added: GHSA-g542-fwh7-jvc6

References

Other 1

  • TI-2026-68945 Authentication bypass in FlexNet Publisher lmadmin SOAP handler CVSS 4.0CRITICAL 9.3
  • TI-2018-14211 Resource allocation without limits in Flexera Software LLC FlexNet Publisher CVSS 3.1CRITICAL 9.8
  • TI-2026-03488 FlexNet Manager Suite Privilege Escalation Vulnerability CVSS 4.0HIGH 8.7
  • TI-2021-18267 2FA bypass on the RISC Platform CVSS 4.0LOW 2.3
  • TI-2020-09734 An elevated privileges issue related to Spring MVC calls impacts Code Insight v7.x… CVSS 3.1CRITICAL 9.9
  • TI-2024-02473 Local privilege escalation in FlexNet Publisher CVSS 4.0HIGH 8.5
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences