{"schemaVersion":3,"id":"CVE-2021-1390","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in one of the diagnostic test CLI commands of Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker would need to have valid user credentials at privilege level 15. This vulnerability exists because the affected software permits modification of the run-time memory of an affected device under specific circumstances. An attacker could exploit this vulnerability by authenticating to the affected device and issuing a specific diagnostic test command at the CLI. A successful exploit could trigger a logic error in the code that was designed to restrict run-time memory modifications. The attacker could take advantage of this logic error to overwrite system memory locations and execute arbitrary code on the underlying Linux operating system (OS) of the affected device.","dates":{"published":"2021-03-24T20:07:27.815Z","modified":"2024-11-08T23:32:45.615Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.2,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.1,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.7,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:H/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":7.2,"severity":"high","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0034,"percentile":0.26037,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.011999999999999988,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00328},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0034,"percentile":0.26037}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00328,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0034,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0034,"percentile":0.26037}]},"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-123","name":"Write-what-where Condition","description":"Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/123.html"}],"affected":[{"vendor":"cisco","product":"cisco ios xe software","name":"Cisco IOS XE Software","label":"cisco ios xe 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_software"},{"vendor":"cisco","product":"ios_xe","name":"ios xe","label":"ios_xe","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"16.8.1","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1a","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1b","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1c","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1d","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1e","noFixRecorded":false,"fixedIn":null},{"text":"16.8.1s","noFixRecorded":false,"fixedIn":null},{"text":"16.8.2","noFixRecorded":false,"fixedIn":null},{"text":"16.8.3","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1a","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1b","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1c","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1d","noFixRecorded":false,"fixedIn":null},{"text":"16.9.1s","noFixRecorded":false,"fixedIn":null},{"text":"16.9.2","noFixRecorded":false,"fixedIn":null},{"text":"16.9.2a","noFixRecorded":false,"fixedIn":null},{"text":"16.9.2s","noFixRecorded":false,"fixedIn":null},{"text":"16.9.3","noFixRecorded":false,"fixedIn":null},{"text":"16.9.3a","noFixRecorded":false,"fixedIn":null},{"text":"16.9.3h","noFixRecorded":false,"fixedIn":null},{"text":"16.9.3s","noFixRecorded":false,"fixedIn":null},{"text":"16.9.4","noFixRecorded":false,"fixedIn":null},{"text":"16.9.4c","noFixRecorded":false,"fixedIn":null},{"text":"16.9.5","noFixRecorded":false,"fixedIn":null},{"text":"16.9.5f","noFixRecorded":false,"fixedIn":null},{"text":"16.9.6","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1a","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1b","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1c","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1d","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1e","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1f","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1g","noFixRecorded":false,"fixedIn":null},{"text":"16.10.1s","noFixRecorded":false,"fixedIn":null},{"text":"16.10.2","noFixRecorded":false,"fixedIn":null},{"text":"16.10.3","noFixRecorded":false,"fixedIn":null},{"text":"16.11.1","noFixRecorded":false,"fixedIn":null},{"text":"16.11.1a","noFixRecorded":false,"fixedIn":null},{"text":"16.11.1b","noFixRecorded":false,"fixedIn":null},{"text":"16.11.1c","noFixRecorded":false,"fixedIn":null},{"text":"16.11.1s","noFixRecorded":false,"fixedIn":null},{"text":"16.11.2","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1a","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1c","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1s","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1t","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1w","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1x","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1y","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1z","noFixRecorded":false,"fixedIn":null},{"text":"16.12.1za","noFixRecorded":false,"fixedIn":null},{"text":"16.12.2","noFixRecorded":false,"fixedIn":null},{"text":"16.12.2a","noFixRecorded":false,"fixedIn":null},{"text":"16.12.2s","noFixRecorded":false,"fixedIn":null},{"text":"16.12.2t","noFixRecorded":false,"fixedIn":null},{"text":"16.12.3","noFixRecorded":false,"fixedIn":null},{"text":"16.12.3a","noFixRecorded":false,"fixedIn":null},{"text":"16.12.3s","noFixRecorded":false,"fixedIn":null},{"text":"16.12.4","noFixRecorded":false,"fixedIn":null},{"text":"16.12.4a","noFixRecorded":false,"fixedIn":null},{"text":"17.1.1","noFixRecorded":false,"fixedIn":null},{"text":"17.1.1a","noFixRecorded":false,"fixedIn":null},{"text":"17.1.1s","noFixRecorded":false,"fixedIn":null},{"text":"17.1.1t","noFixRecorded":false,"fixedIn":null},{"text":"17.1.2","noFixRecorded":false,"fixedIn":null},{"text":"17.2.1","noFixRecorded":false,"fixedIn":null},{"text":"17.2.1a","noFixRecorded":false,"fixedIn":null},{"text":"17.2.1r","noFixRecorded":false,"fixedIn":null},{"text":"17.2.1v","noFixRecorded":false,"fixedIn":null},{"text":"17.2.2","noFixRecorded":false,"fixedIn":null},{"text":"17.2.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"16.8.1 | 16.8.1a | 16.8.1b | 16.8.1c | 16.8.1d | 16.8.1e | 16.8.1s | 16.8.2 | 16.8.3 | 16.9.1 | 16.9.1a | 16.9.1b | 16.9.1c | 16.9.1d | 16.9.1s | 16.9.2 | 16.9.2a | 16.9.2s | 16.9.3 | 16.9.3a | 16.9.3h | 16.9.3s | 16.9.4 | 16.9.4c | 16.9.5 | 16.9.5f | 16.9.6 | 16.10.1 | 16.10.1a | 16.10.1b | 16.10.1c | 16.10.1d | 16.10.1e | 16.10.1f | 16.10.1g | 16.10.1s | 16.10.2 | 16.10.3 | 16.11.1 | 16.11.1a | 16.11.1b | 16.11.1c | 16.11.1s | 16.11.2 | 16.12.1 | 16.12.1a | 16.12.1c | 16.12.1s | 16.12.1t | 16.12.1w | 16.12.1x | 16.12.1y | 16.12.1z | 16.12.1za | 16.12.2 | 16.12.2a | 16.12.2s | 16.12.2t | 16.12.3 | 16.12.3a | 16.12.3s | 16.12.4 | 16.12.4a | 17.1.1 | 17.1.1a | 17.1.1s | 17.1.1t | 17.1.2 | 17.2.1 | 17.2.1a | 17.2.1r | 17.2.1v | 17.2.2 | 17.2.3","eol":null,"hubHref":"/vendor/cisco/ios_xe"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-OFP-6Nezgn7b","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-OFP-6Nezgn7b","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-03-24T20:07:27.815Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-08T23:32:45.615Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":29,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T11:33:51.855Z","stale":false,"partial":false}}