{"id":"CVE-2026-4869","aliases":["EUVD-2026-98744","GHSA-g542-fwh7-jvc6"],"status":"published","title":"Potential Privilege Escalation in InstallShield","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.","severity":{"version":"4.0","score":5.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00112,"percentile":0.01408,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-426"],"published":"2026-10-13T14:10:11Z","modified":"2026-10-16T16:00:33Z","products":[{"vendor":"flexera","product":"installshield"},{"vendor":"revenera","product":"installshield"}],"references":[{"url":"https://community.revenera.com/s/article/CVE-2026-4869-Potential-Privilege-Escalation-in-InstallShield-2025-R2-running-Setup-Prerequisites-from-an-insecure-directory"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4869"},{"url":"https://github.com/advisories/GHSA-g542-fwh7-jvc6"}],"sources":{"cve":[{"id":"CVE-2026-4869","title":"Potential Privilege Escalation in InstallShield","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.","status":"published","published":"2026-10-13T14:10:11.962Z","modified":"2026-10-13T15:49:47.206Z","cvss":[{"version":"4.0","score":5.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:19:59.369956Z"}],"euvd":[{"id":"EUVD-2026-98744","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.","status":"published","published":"2026-10-13T14:10:11Z","modified":"2026-10-13T15:49:47Z","cvss":[{"version":"4.0","score":5.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:20.397021Z"}],"ghsa":[{"id":"GHSA-g542-fwh7-jvc6","title":"A potential privilege escalation issue was identified in InstallShield version 2025 R2 and...","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.","status":"published","published":"2026-10-13T15:32:26Z","modified":"2026-10-13T15:32:37Z","cvss":[{"version":"4.0","score":5.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T15:13:11.391487Z"}],"nvd":[{"id":"CVE-2026-4869","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.","status":"published","published":"2026-10-13T15:17:44.48Z","modified":"2026-10-16T16:00:33.533Z","cvss":[{"version":"4.0","score":5.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:12:57.132005Z"}]}}