{"api_version":"1","generated_at":"2026-07-23T11:40:46+00:00","cve":"CVE-1999-0159","urls":{"html":"https://cve.report/CVE-1999-0159","api":"https://cve.report/api/cve/CVE-1999-0159.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-1999-0159","nvd":"https://nvd.nist.gov/vuln/detail/CVE-1999-0159"},"summary":{"title":"CVE-1999-0159","description":"Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login).  This applies to some IOS 9.x, 10.x, and 11.x releases.","state":"PUBLISHED","assigner":"mitre","published_at":"1998-08-12 04:00:00","updated_at":"2025-08-27 19:15:33"},"problem_types":["NVD-CWE-Other","CWE-400","n/a","CWE-400 CWE-400 Uncontrolled Resource Consumption"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"3.5","severity":"LOW","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"3.5","severity":"LOW","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","baseScore":3.5,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"5","severity":"","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"}}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159","name":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"IBM X-Force Exchange","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-1999-0159","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-0159","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.0\\(20.3\\)","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(15\\)ca","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(16\\)","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(16\\)aa","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(16\\)ia","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(17\\)cc","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.1\\(17\\)ct","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.2\\(10\\)","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.2\\(10\\)bc","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.2\\(8\\)sa3","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.2\\(9\\)p","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.2\\(9\\)xa","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.3\\(1\\)","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.3\\(1\\)ed","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"11.3\\(1\\)t","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"1999","cve_id":"159","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"cisco","cpe5":"ios","cpe6":"9.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-01T16:27:57.802Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159"}],"title":"CVE Program Container"},{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","version":"3.1"}},{"other":{"content":{"id":"CVE-1999-0159","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2025-08-27T18:38:07.688027Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-08-27T18:38:54.613Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login).  This applies to some IOS 9.x, 10.x, and 11.x releases."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2022-08-17T06:49:36.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-1999-0159","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login).  This applies to some IOS 9.x, 10.x, and 11.x releases."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159","refsource":"MISC","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0159"}]}}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-1999-0159","datePublished":"1999-09-29T04:00:00.000Z","dateReserved":"1999-06-07T00:00:00.000Z","dateUpdated":"2025-08-27T18:38:54.613Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"1998-08-12 04:00:00","lastModifiedDate":"2025-08-27 19:15:33","problem_types":["NVD-CWE-Other","CWE-400","n/a","CWE-400 CWE-400 Uncontrolled Resource Consumption"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","baseScore":3.5,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":2.1,"impactScore":1.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:*","matchCriteriaId":"2E9A00D5-A594-4C64-B982-10CB4C554F51"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.0\\(20.3\\):*:*:*:*:*:*:*","matchCriteriaId":"86AFAF8F-B8E2-453B-895C-F94138720745"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(15\\)ca:*:*:*:*:*:*:*","matchCriteriaId":"841513AE-7521-4670-8438-AE5EB70F3A48"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(16\\):*:*:*:*:*:*:*","matchCriteriaId":"FF3E8F79-6177-453C-99B5-BC9BC7670869"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(16\\)aa:*:*:*:*:*:*:*","matchCriteriaId":"4B244655-A6A5-40D0-A0D1-34C814DA9389"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(16\\)ia:*:*:*:*:*:*:*","matchCriteriaId":"CA064273-1A6E-4303-BAAB-F585691EF9BA"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(17\\)cc:*:*:*:*:*:*:*","matchCriteriaId":"0A8158E2-0DFE-479B-B085-9775FF700C85"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.1\\(17\\)ct:*:*:*:*:*:*:*","matchCriteriaId":"29CA3070-B75D-4E56-A338-E10F5509394E"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.2\\(8\\)sa3:*:*:*:*:*:*:*","matchCriteriaId":"099CFED1-0E2F-46B2-8136-BFA146EB9A00"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.2\\(9\\)p:*:*:*:*:*:*:*","matchCriteriaId":"047F9781-38B8-488C-B999-A3CA6BDB639C"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.2\\(9\\)xa:*:*:*:*:*:*:*","matchCriteriaId":"3E3586C0-64AF-4584-8F56-7E0756B4A521"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.2\\(10\\):*:*:*:*:*:*:*","matchCriteriaId":"9B784C9F-79EE-4D08-9D03-985EC7E378FE"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.2\\(10\\)bc:*:*:*:*:*:*:*","matchCriteriaId":"FFBA8825-442E-4CAD-A9B2-4DD8546F35F9"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.3\\(1\\):*:*:*:*:*:*:*","matchCriteriaId":"2A6F8329-15C7-4FED-A61D-5AF4F3A33976"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.3\\(1\\)ed:*:*:*:*:*:*:*","matchCriteriaId":"CD13732A-DAE0-4D5B-9DAC-6D2CF391220D"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios:11.3\\(1\\)t:*:*:*:*:*:*:*","matchCriteriaId":"A53DE80A-5865-4514-BE14-BA5992EE7BDA"}]}]}]},"legacy_mitre":{"record":{"CveYear":"1999","CveId":"159","Ordinal":"1","Title":"CVE-1999-0159","CVE":"CVE-1999-0159","Year":"1999"},"notes":[{"CveYear":"1999","CveId":"159","Ordinal":"1","NoteData":"Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login).  This applies to some IOS 9.x, 10.x, and 11.x releases.","Type":"Description","Title":"CVE-1999-0159"},{"CveYear":"1999","CveId":"159","Ordinal":"2","NoteData":"1999-09-29","Type":"Other","Title":"Published"},{"CveYear":"1999","CveId":"159","Ordinal":"3","NoteData":"2009-03-01","Type":"Other","Title":"Modified"}]}}}