{"answers":{"affected":"It affects 146 products.","exploited":"There is no known exploitation of CVE-2021-1619 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-1619 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-1619 is a critical authentication bypass vulnerability in Cisco Ios Xe, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-1619 and fix it if it is affected.\n\nWhat it is: CVE-2021-1619 is a critical authentication bypass vulnerability in Cisco Ios Xe, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-1619 in the wild and no public exploit code.\n\nAffected product: Cisco Ios Xe. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-1619/ (Markdown: https://insights.sbomify.com/CVE-2021-1619/index.md)","id":"CVE-2021-1619","markdown":"https://insights.sbomify.com/CVE-2021-1619/index.md","name":"CVE-2021-1619","record":{"aliases":["GHSA-q3g7-fff3-j4mq"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco IOS XE","requires_auth":"none","summary":"Unauthenticated remote attackers can bypass NETCONF/RESTCONF authentication to modify device configurations or cause denial of service.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"ios_xe","vendor":"cisco"},{"product":"ios_xe_sd-wan","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.1_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.1_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.1_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.1_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.2_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.2_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.2_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.2_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3a_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3a_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3a_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3a_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3a_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3b_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3b_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3b_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3b_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.3b_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.4_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.4_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.4_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.4_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.4_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.5_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.5_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.5_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.5_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.5_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.6_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.6_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.6_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.6_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.10.6_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1a_when_installed_on_1000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1a_when_installed_on_4000_series_integrated_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1a_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1a_when_installed_on_cloud_services_router_1000v","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1a_when_installed_on_integrated_services_virtual","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.11.1b_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.9.4_when_installed_on_asr_1000_series_aggregation_services","vendor":"cisco"},{"product":"ios_xe_sd-wan_16.9.4_when_installed_on_integrated_services_virtual","vendor":"cisco"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-908","name":"Use of Uninitialized Resource"},{"id":"CWE-824","name":"Access of Uninitialized Pointer"}],"description":"A vulnerability in the authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass NETCONF or RESTCONF authentication and do either of the following: Install, manipulate, or delete the configuration of an affected device Cause memory corruption that results in a denial of service (DoS) on an affected device This vulnerability is due to an uninitialized variable. An attacker could exploit this vulnerability by sending a series of NETCONF or RESTCONF requests to an affected device. A successful exploit could allow the attacker to use NETCONF or RESTCONF to install, manipulate, or delete the configuration of a network device or to corrupt memory on the device, resulting a DoS.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cisco IOS XE Software NETCONF and RESTCONF Authentication Bypass Vulnerability","id":"CVE-2021-1619","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"cisco:ios_xe","products":["cisco:ios_xe"],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability","id":"CVE-2021-1620"},"packages":[],"prev":{"headline":"Cisco Intersight Virtual Appliance Vulnerabilities","id":"CVE-2021-1618"},"products":["Cisco IOS XE Software"],"published":"2021-09-23","related":[{"cvss_score":10,"headline":"Cisco IOS XE Web UI Privilege Escalation","id":"CVE-2023-20198","kev_date_added":"2023-10-16","published":"2023-10-16"},{"cvss_score":9.8,"headline":"Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution","id":"CVE-2018-0151","kev_date_added":"2022-03-03","published":"2018-03-28"},{"cvss_score":7.2,"headline":"Cisco IOS XE Web UI Command Injection","id":"CVE-2023-20273","kev_date_added":"2023-10-23","published":"2023-10-24"},{"cvss_score":10,"headline":"Hardcoded credentials in Cisco IOS XE Software","id":"CVE-2025-20188","kev_date_added":null,"published":"2025-05-07"},{"cvss_score":10,"headline":"Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability","id":"CVE-2021-34770","kev_date_added":null,"published":"2021-09-23"},{"cvss_score":10,"headline":"Cisco REST API Container for IOS XE Software Authentication Bypass Vulnerability","id":"CVE-2019-12643","kev_date_added":null,"published":"2019-08-28"},{"cvss_score":9.8,"headline":"Cisco IOS XE Software Security Hardening Release","id":"CVE-2026-20272","kev_date_added":null,"published":"2026-08-05"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-11-07","vendors":["Cisco"]},"summary":"Unauthenticated remote attackers can bypass NETCONF/RESTCONF authentication to modify device configurations or cause denial of service.","url":"https://insights.sbomify.com/CVE-2021-1619/"}