{"schemaVersion":3,"id":"CVE-2026-53563","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Vulnerability in Citrix UniconOS leading to Persistent Command Execution\n\nThis issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.","dates":{"published":"2026-10-13T22:04:13.778Z","modified":"2026-10-14T18:26:05.074Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.9,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/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":0.00215,"percentile":0.1119,"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":0.00197,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00215,"percentile":0.1119}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00197,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00215,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00215,"percentile":0.1119}]},"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-78","name":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","description":"The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/78.html"}],"affected":[{"vendor":"citrix","product":"uniconos","name":"UniconOS","label":"uniconos","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2607.2 CR","noFixRecorded":false,"fixedIn":null},{"text":"< 2603 LTSR CU2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2607.2 CR | < 2603 LTSR CU2","eol":null,"hubHref":"/vendor/citrix/uniconos"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697187","label":"support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697187","hostname":"support.citrix.com","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T22:04:13.778Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-14T18:26:05.074Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:27:44.717Z","stale":false,"partial":false}}