{"id":"CVE-2026-53563","title":"Vulnerability in Citrix UniconOS leading to Persistent Command Execution\n\nThis issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.","summary":"Vulnerability in Citrix UniconOS leading to Persistent Command Execution\n\nThis issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.","severity":"medium","cwe":["CWE-78"],"published":"2026-10-13","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:17:15.993","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53563","references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697187","label":"secure@citrix.com"}],"tags":["nvd","cve.org"],"epss":0.0026,"epssPercentile":0.1766,"ingestedAt":"2026-10-14T00:07:19.219Z","vendor":"Citrix","product":"UniconOS","affected":["UniconOS < 2607.2 CR","UniconOS < 2603 LTSR CU2"],"cvss":6.9,"cvssVector":"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","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T18:25:44.402509Z"},"cvssSource":"cna","slug":"CVE-2026-53563","body":"## Overview\n\nVulnerability in Citrix UniconOS leading to Persistent Command Execution\n\nThis issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":221806,"id":"CVE-2026-53563","ts":1792035825255,"field":"cvss","old":null,"new":"6.9"},{"seq":221805,"id":"CVE-2026-53563","ts":1792035825255,"field":"severity","old":"none","new":"medium"}]}