{"schemaVersion":3,"id":"CVE-2021-1529","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges. The vulnerability is due to insufficient input validation by the system CLI. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the system CLI. A successful exploit could allow the attacker to execute commands on the underlying operating system with root privileges.","dates":{"published":"2021-10-21T02:45:10.183Z","modified":"2024-11-07T21:47:38.698Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.9,"severity":"medium","vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00307,"percentile":0.22111,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00307},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00307,"percentile":0.22111}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00307,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00307,"percentile":0.22111}]},"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":"cisco","product":"cisco ios xe sd-wan software","name":"Cisco IOS XE SD-WAN Software","label":"cisco ios xe sd-wan software","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"n/a","noFixRecorded":false,"fixedIn":null}],"versionsText":"n/a","eol":null,"hubHref":"/vendor/cisco/cisco_ios_xe_sd-wan_software"},{"vendor":"cisco","product":"ios_xe","name":"ios xe","label":"ios_xe","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 16.12, ≤ 17.0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 17.2, < 17.2.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 17.3, < 17.3.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 17.4, < 17.4.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 17.5, < 17.5.1a","noFixRecorded":false,"fixedIn":null},{"text":"17.6.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 16.12, ≤ 17.0 | ≥ 17.2, < 17.2.3 | ≥ 17.3, < 17.3.4 | ≥ 17.4, < 17.4.2 | ≥ 17.5, < 17.5.1a | 17.6.0","eol":null,"hubHref":"/vendor/cisco/ios_xe"},{"vendor":"cisco","product":"ios_xe_sd-wan","name":"ios xe sd-wan","label":"ios_xe_sd-wan","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 17.2.1r","noFixRecorded":true,"fixedIn":null}],"versionsText":"≥ 17.2.1r (No fix recorded)","eol":null,"hubHref":"/vendor/cisco/ios_xe_sd-wan"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-rhpbE34A","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-rhpbE34A","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-10-21T02:45:10.183Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-07T21:47:38.698Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:29:52.615Z","stale":false,"partial":false}}