{"id":"CVE-2016-6366","aliases":["EUVD-2016-7289","GHSA-pfgh-2mw6-962h"],"status":"published","title":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500,...","description":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-06","score":0.87565,"percentile":0.9976,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-119","CWE-120"],"published":"2016-08-18T18:00:00Z","modified":"2026-06-17T00:50:54Z","kev":{"date_added":"2022-05-24","due_date":"2022-06-14","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2022-05-24"},{"source":"kev","since":"2022-05-24"}],"exploits":[{"source":"exploitdb","id":"EDB-40258","title":"Cisco ASA 8.x - 'EXTRABACON' Authentication Bypass","type":"remote","platform":"hardware","date":"2016-08-18","url":"https://www.exploit-db.com/exploits/40258"},{"source":"pocgithub","id":"RiskSense-Ops/CVE-2016-6366","title":"RiskSense-Ops/CVE-2016-6366","date":"2016-09-20","url":"https://github.com/RiskSense-Ops/CVE-2016-6366"},{"source":"metasploit","id":"auxiliary/admin/networking/cisco_asa_extrabacon","title":"Cisco ASA Authentication Bypass (EXTRABACON)","type":"auxiliary","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/admin/networking/cisco_asa_extrabacon"}],"products":[{"vendor":"cisco","product":"adaptive security appliance (asa)"},{"vendor":"cisco","product":"adaptive_security_appliance_software"},{"vendor":"cisco","product":"asa_1000v_cloud_firewall_software"},{"vendor":"cisco","product":"pix_firewall_software"}],"references":[{"url":"http://www.securityfocus.com/bid/92521","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Not Applicable","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip","tags":["x_refsource_MISC","x_transferred","Broken Link","Exploit"]},{"url":"http://blogs.cisco.com/security/shadow-brokers","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Press/Media Coverage","Vendor Advisory"]},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description"]},{"url":"https://www.exploit-db.com/exploits/40258/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1036637","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6366","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-6366"},{"url":"https://www.exploit-db.com/exploits/40258"},{"url":"https://github.com/advisories/GHSA-pfgh-2mw6-962h"}],"sources":{"cve":[{"id":"CVE-2016-6366","description":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.","status":"published","published":"2016-08-18T18:00:00Z","modified":"2026-01-12T20:50:50.619Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:33:34.443637Z"}],"euvd":[{"id":"EUVD-2016-7289","description":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.","status":"published","published":"2016-08-18T18:00:00Z","modified":"2026-01-12T20:50:50Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2022-05-24","updated_at":"2026-11-02T19:48:53.22038Z"}],"ghsa":[{"id":"GHSA-pfgh-2mw6-962h","title":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500,...","description":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.","status":"published","published":"2022-05-17T03:39:31Z","modified":"2025-10-22T00:32:21Z","cvss":[{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119","CWE-120"],"updated_at":"2026-11-02T15:04:05.344883Z"}],"kev":[{"id":"CVE-2016-6366","title":"Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability","description":"A buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASA software could allow an attacker to cause a reload of the affected system or to remotely execute code.","cwes":["CWE-119"],"kev":{"date_added":"2022-05-24","due_date":"2022-06-14","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2016-6366","description":"Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.","status":"published","published":"2016-08-18T18:59:00.117Z","modified":"2026-06-17T00:50:54.163Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":8.5,"vector":"AV:N/AC:M/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:03:28.854267Z"}]}}