{"id":"CVE-2015-4236","aliases":["EUVD-2015-4259","GHSA-gh4h-fj72-jqq3"],"status":"published","title":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9...","description":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9.0.0-461, when clustering is enabled, allows remote attackers to cause a denial of service (clustering and SSH outage) via a packet flood, aka Bug IDs CSCur13704 and CSCuq05636.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02377,"percentile":0.83978,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-399"],"published":"2015-07-10T19:00:00Z","modified":"2026-06-17T00:26:58Z","products":[{"vendor":"cisco","product":"email_security_appliance"},{"vendor":"cisco","product":"email_security_appliance_firmware"}],"references":[{"url":"http://www.securitytracker.com/id/1032855","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/75703","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://tools.cisco.com/security/center/viewAlert.x?alertId=39785","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-4236"},{"url":"https://github.com/advisories/GHSA-gh4h-fj72-jqq3"}],"sources":{"cve":[{"id":"CVE-2015-4236","description":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9.0.0-461, when clustering is enabled, allows remote attackers to cause a denial of service (clustering and SSH outage) via a packet flood, aka Bug IDs CSCur13704 and CSCuq05636.","status":"published","published":"2015-07-10T19:00:00Z","modified":"2024-08-06T06:11:11.787Z","updated_at":"2026-11-02T14:35:43.322279Z"}],"euvd":[{"id":"EUVD-2015-4259","description":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9.0.0-461, when clustering is enabled, allows remote attackers to cause a denial of service (clustering and SSH outage) via a packet flood, aka Bug IDs CSCur13704 and CSCuq05636.","status":"published","published":"2015-07-10T19:00:00Z","modified":"2024-08-06T06:11:11Z","updated_at":"2026-11-03T02:22:04.533858Z"}],"ghsa":[{"id":"GHSA-gh4h-fj72-jqq3","title":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9...","description":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9.0.0-461, when clustering is enabled, allows remote attackers to cause a denial of service (clustering and SSH outage) via a packet flood, aka Bug IDs CSCur13704 and CSCuq05636.","status":"published","published":"2022-05-14T02:13:07Z","modified":"2023-02-02T05:05:23Z","updated_at":"2026-11-02T14:52:06.092141Z"}],"nvd":[{"id":"CVE-2015-4236","description":"Cisco AsyncOS on Email Security Appliance (ESA) devices with software 8.5.6-073, 8.5.6-074, and 9.0.0-461, when clustering is enabled, allows remote attackers to cause a denial of service (clustering and SSH outage) via a packet flood, aka Bug IDs CSCur13704 and CSCuq05636.","status":"published","published":"2015-07-10T19:59:00.097Z","modified":"2026-06-17T00:26:58.497Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:03:07.96297Z"}]}}