{"uuid": "459f0a0b-06f1-485f-a8ee-5addb3196efb", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-20182", "type": "seen", "source": "https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/admin/networking/cisco_sdwan_vhub_auth_bypass.rb", "content": "{\"actions\": [], \"aliases\": [], \"arch\": \"\", \"author\": [\"sfewer-r7\", \"Crypto-Cat\"], \"autofilter_ports\": [], \"autofilter_services\": [], \"check\": true, \"default_credential\": false, \"description\": \"This module exploits an authentication bypass vulnerability (CVE-2026-20182)\\n          in the Cisco Catalyst SD-WAN Controller. The vdaemon DTLS control-plane\\n          service performs no certificate or credential verification for connecting peers\\n          that claim to be a vHub (device type 2). The vbond_proc_challenge_ack() function\\n          implements device-type-specific verification through a series of conditional\\n          blocks, but contains no code path for device type 2 (vHub). After a DTLS\\n          handshake using any self-signed certificate, an attacker sends a CHALLENGE_ACK\\n          (msg_type=9) with the vHub device type encoded in the protocol header. The\\n          function falls through all verification checks and unconditionally sets\\n          peer->authenticated = 1.\\n\\n          This module leverages the authentication bypass to inject an attacker-controlled\\n          SSH public key into the vmanage-admin user's authorized_keys file via a\\n          VMANAGE_TO_PEER message (msg_type=14), providing persistent SSH access to the\\n          controller over the NETCONF service (TCP port 830).\\n\\n          Affected versions: Cisco Catalyst SD-WAN Controller 20.12.6.1 and earlier.\\n          Consult Cisco's security advisory for a complete list of affected versions\\n          and patches.\", \"disclosure_date\": \"2026-05-07\", \"fullname\": \"auxiliary/admin/networking/cisco_sdwan_vhub_auth_bypass\", \"is_install_path\": true, \"mod_time\": \"2026-06-30 14:15:16 +0000\", \"name\": \"Cisco Catalyst SD-WAN Controller vHub Authentication Bypass\", \"needs_cleanup\": false, \"notes\": {\"Reliability\": [], \"SideEffects\": [\"artifacts-on-disk\", \"ioc-in-logs\"], \"Stability\": [\"crash-safe\"]}, \"path\": \"/modules/auxiliary/admin/networking/cisco_sdwan_vhub_auth_bypass.rb\", \"platform\": \"\", \"post_auth\": false, \"rank\": 300, \"ref_name\": \"admin/networking/cisco_sdwan_vhub_auth_bypass\", \"references\": [\"CVE-2026-20182\", \"URL-https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW\", \"URL-https://blog.talosintelligence.com/sd-wan-ongoing-exploitation/\", \"URL-https://www.rapid7.com/blog/post/ve-cve-2026-20182-critical-authentication-bypass-cisco-catalyst-sd-wan-controller-fixed/\"], \"rport\": 12346, \"session_types\": false, \"targets\": null, \"type\": \"auxiliary\"}", "creation_timestamp": "2026-09-08T06:46:53.526793Z"}