{"id":"CVE-2021-1371","title":"Cisco SD-WAN Software Improper Privilege Management Vulnerability","summary":"A vulnerability in the role-based access control of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker with read-only privileges to obtain administrative privileges by using the console port when the device is in the…","severity":"medium","cvss":6.6,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","vendor":"Cisco","product":"Cisco IOS XE Software","affected":["1000_series_integrated_services_routers","asr_1000_series_aggregation_services_routers","4000_series_integrated_services_routers","integrated_services_virtual_router","cloud_services_router_1000v_series","catalyst_ir1100_rugged_series_routers","ios_xe_software 16.9.1","ios_xe_software 16.10.1","ios_xe_software 16.11.1","ios_xe_software 16.12.1","ios_xe_software 16.9.2","ios_xe_software 17.1.1","ios_xe_software 16.9.3","ios_xe_software 17.2.1","ios_xe_software 16.11.1a","ios_xe_software 17.3.1","ios_xe_software 16.11.1b","ios_xe_software 16.10.2","ios_xe_software 16.11.2","ios_xe_software 16.11.1s","ios_xe_software 16.9.4","ios_xe_software 16.11.1c","ios_xe_software 16.12.1s","ios_xe_software 16.12.1a","ios_xe_software 16.12.1c","ios_xe_software 16.12.2","ios_xe_software 16.12.2a","ios_xe_software 17.1.1a","ios_xe_software 16.10.3","ios_xe_software 16.12.3","ios_xe_software 16.12.2s","ios_xe_software 17.1.1s","ios_xe_software 16.12.1t","ios_xe_software 16.12.2t","ios_xe_software 16.12.4","ios_xe_software 17.2.1r","ios_xe_software 16.12.3s","ios_xe_software 16.12.3a","ios_xe_software 17.1.2","ios_xe_software 17.2.1a"],"published":"2021-03-24","updated":"2021-03-24","sourceUpdated":"2021-03-24T16:00:00+00:00","source":"CSAF","sourceUrl":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-esc-rSNVvTf9","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-esc-rSNVvTf9"},{"url":"https://software.cisco.com"}],"tags":["csaf","vendor-advisory","cisco"],"epss":0.00254,"epssPercentile":0.15055,"ingestedAt":"2026-09-25T07:41:37.796Z","slug":"CVE-2021-1371","body":"## Overview\n\nA vulnerability in the role-based access control of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker with read-only privileges to obtain administrative privileges by using the console port when the device is in the default SD-WAN configuration.\r\n\r\nThis vulnerability occurs because the default configuration is applied for console authentication and authorization. An attacker could exploit this vulnerability by connecting to the console port and authenticating as a read-only user. A successful exploit could allow a user with read-only permissions to access administrative privileges.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\n\n## Vendor advisories\n\n- **cisco-sa-sdwan-esc-rSNVvTf9** · Cisco · affected: Cisco 1000 Series Integrated Services Routers, Cisco ASR 1000 Series Aggregation Services Routers, Cisco 4000 Series Integrated Services Routers, Cisco Integrated Services Virtual Router, Cisco Cloud Services Router 1000V Series, Cisco Catalyst IR1100 Rugged Series Routers, … · updated 2021-03-24 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-esc-rSNVvTf9)\n\n**Cisco IOS XE SD-WAN Software Console Privilege Escalation Vulnerability**. Released 2021-03-24.\n\nAffected:\n\n- Cisco 1000 Series Integrated Services Routers\n- Cisco ASR 1000 Series Aggregation Services Routers\n- Cisco 4000 Series Integrated Services Routers\n- Cisco Integrated Services Virtual Router\n- Cisco Cloud Services Router 1000V Series\n- Cisco Catalyst IR1100 Rugged Series Routers\n- Cisco IOS XE Software 16.9.1\n- Cisco IOS XE Software 16.10.1\n- Cisco IOS XE Software 16.11.1\n- Cisco IOS XE Software 16.12.1\n- Cisco IOS XE Software 16.9.2\n- Cisco IOS XE Software 17.1.1\n- Cisco IOS XE Software 16.9.3\n- Cisco IOS XE Software 17.2.1\n- Cisco IOS XE Software 16.11.1a\n- Cisco IOS XE Software 17.3.1\n- Cisco IOS XE Software 16.11.1b\n- Cisco IOS XE Software 16.10.2\n- Cisco IOS XE Software 16.11.2\n- Cisco IOS XE Software 16.11.1s\n- Cisco IOS XE Software 16.9.4\n- Cisco IOS XE Software 16.11.1c\n- Cisco IOS XE Software 16.12.1s\n- Cisco IOS XE Software 16.12.1a\n- Cisco IOS XE Software 16.12.1c\n- Cisco IOS XE Software 16.12.2\n- Cisco IOS XE Software 16.12.2a\n- Cisco IOS XE Software 17.1.1a\n- Cisco IOS XE Software 16.10.3\n- Cisco IOS XE Software 16.12.3\n- Cisco IOS XE Software 16.12.2s\n- Cisco IOS XE Software 17.1.1s\n- Cisco IOS XE Software 16.12.1t\n- Cisco IOS XE Software 16.12.2t\n- Cisco IOS XE Software 16.12.4\n- Cisco IOS XE Software 17.2.1r\n- Cisco IOS XE Software 16.12.3s\n- Cisco IOS XE Software 16.12.3a\n- Cisco IOS XE Software 17.1.2\n- Cisco IOS XE Software 17.2.1a\n\n## Remediation\n\nCisco has released software updates that address this vulnerability. https://software.cisco.com","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":36.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}