{"schemaVersion":3,"id":"CVE-2026-4869","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-13T14:10:11.962Z","modified":"2026-10-13T15:49:47.206Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.4,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.4,"severity":"medium","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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.4,"severity":"medium","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","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00112,"percentile":0.0131,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00112,"percentile":0.0131}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00112,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00112,"percentile":0.0131}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-426","name":"Untrusted Search Path","description":"The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/426.html"}],"affected":[{"vendor":"flexera","product":"installshield","name":"InstallShield","label":"installshield","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 2025 R2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2025 R2","eol":null,"hubHref":"/vendor/flexera/installshield"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"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","label":"community.revenera.com/s/…","hostname":"community.revenera.com","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T14:10:11.962Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-13T15:49:47.206Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:52:04.190Z","stale":false,"partial":false}}