{"schemaVersion":3,"id":"CVE-2026-87668","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A stack-based buffer overflow vulnerability exists in the diagnostic execution utility of Brocade Fabric OS versions before 10.0.1. When processing command arguments for diagnostic operations, the utility tokenizes user-supplied input into an internal argument array without enforcing boundary checks on the maximum array capacity. An authenticated user with administrative access can exploit this vulnerability by supplying a crafted diagnostic command string containing an excessive number of tokenized arguments. This leads to a memory overwrite resulting in a denial of service (process crash).","dates":{"published":"2026-10-08T03:00:54.306Z","modified":"2026-10-08T13:46:29.700Z","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:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/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:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/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:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/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},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0039,"percentile":0.31892,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-08T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0039,"percentile":0.31892}],"last30":[{"date":"2026-10-08T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00164,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0039,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0039,"percentile":0.31892}]},"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-121","name":"Stack-based Buffer Overflow","description":"A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/121.html"}],"affected":[{"vendor":"broadcom","product":"fabric_operating_system","name":"fabric operating system","label":"fabric_operating_system","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 10.0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.0.1","eol":null,"hubHref":"/vendor/broadcom/fabric_operating_system"},{"vendor":"brocade","product":"fabric_os","name":"fabric os","label":"fabric_os","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 10.0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.0.1","eol":null,"hubHref":"/vendor/brocade/fabric_os"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://support.broadcom.com/external/content/SecurityAdvisories/0/39152","label":"support.broadcom.com/external/content/SecurityAdvisories/0/39152","hostname":"support.broadcom.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-08T03:00:54.306Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-08T13:46:29.700Z","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":"2026-10-22T10:46:55.370Z","stale":false,"partial":false}}