{"id":"CVE-2026-20212","aliases":["EUVD-2026-70201","GHSA-6g5h-4mv8-prv7"],"status":"published","title":"Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability","description":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with\u0026nbsp;root privileges.\r\n\r\nThis vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with\u0026nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00831,"percentile":0.57877,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-1327"],"published":"2026-09-02T16:13:08Z","modified":"2026-09-03T13:04:38Z","exploits":[{"source":"pocgithub","id":"HORKimhab/CVE-2026-20212","title":"HORKimhab/CVE-2026-20212","date":"2026-09-03","url":"https://github.com/HORKimhab/CVE-2026-20212"}],"products":[{"vendor":"cisco","product":"cisco nx-os software"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9k-s1-rce-EH8dEtr"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20212"},{"url":"https://github.com/advisories/GHSA-6g5h-4mv8-prv7"}],"sources":{"cve":[{"id":"CVE-2026-20212","title":"Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability","description":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with\u0026nbsp;root privileges.\r\n\r\nThis vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with\u0026nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.","status":"published","published":"2026-09-02T16:13:08.882Z","modified":"2026-09-03T03:56:34.679Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-1327"],"updated_at":"2026-11-02T13:35:44.571002Z"}],"euvd":[{"id":"EUVD-2026-70201","description":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with\u0026nbsp;root privileges.\r\n\r\nThis vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with\u0026nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.","status":"published","published":"2026-09-02T16:13:08Z","modified":"2026-09-03T03:56:34Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:14.198061Z"}],"ghsa":[{"id":"GHSA-6g5h-4mv8-prv7","title":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow...","description":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with\u0026nbsp;root privileges.\n\nThis vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with\u0026nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.","status":"published","published":"2026-09-02T18:32:25Z","modified":"2026-09-02T18:32:26Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-1327"],"updated_at":"2026-11-02T15:11:17.943368Z"}],"nvd":[{"id":"CVE-2026-20212","description":"A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with\u0026nbsp;root privileges.\r\n\r\nThis vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with\u0026nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.","status":"published","published":"2026-09-02T17:17:31.547Z","modified":"2026-09-03T13:04:38.177Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-1327"],"updated_at":"2026-11-02T14:12:43.399612Z"}]}}