{"id":"CVE-2015-6420","title":"Serialized-object interfaces in certain Cisco Collaboration and Social Media; Endpoint Clients and Client Software; Network Application, Service, and Acceleration; Network and Content Security Devices; Network Management and Provisioning…","summary":"Serialized-object interfaces in certain Cisco Collaboration and Social Media; Endpoint Clients and Client Software; Network Application, Service, and Acceleration; Network and Content Security Devices; Network Management and Provisioning…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-502"],"vendor":"apache","product":"commons_collections","affected":["commons_collections >= 3.0, < 3.2.2","commons_collections = 4.0"],"patched":["commons_collections 3.2.2"],"published":"2015-12-15","updated":"2026-10-07","sourceUpdated":"2026-10-07T18:17:07.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2015-6420","references":[{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization","label":"psirt@cisco.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","label":"psirt@cisco.com"},{"url":"http://www.securityfocus.com/bid/78872","label":"psirt@cisco.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917","label":"psirt@cisco.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722","label":"psirt@cisco.com"},{"url":"https://lists.apache.org/thread.html/r352e40ca9874d1beb4ad95403792adca7eb295e6bc3bd7b65fabcc21%40%3Ccommits.samza.apache.org%3E","label":"psirt@cisco.com"},{"url":"https://www.kb.cert.org/vuls/id/581311","label":"psirt@cisco.com"},{"url":"https://www.tenable.com/security/research/tra-2017-14","label":"psirt@cisco.com"},{"url":"https://www.tenable.com/security/research/tra-2017-23","label":"psirt@cisco.com"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/78872","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r352e40ca9874d1beb4ad95403792adca7eb295e6bc3bd7b65fabcc21%40%3Ccommits.samza.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://news.apache.org/foundation/entry/apache_commons_statement_to_widespread","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.kb.cert.org/vuls/id/576313","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.kb.cert.org/vuls/id/581311","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/research/tra-2017-14","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/research/tra-2017-23","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org","exploit-available"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-07T17:55:00.626377Z"},"epss":0.18763,"epssPercentile":0.97211,"exploits":{"github":1,"githubRepos":["https://github.com/Leeziao/CVE-2015-6420"],"checkedAt":"2026-10-07T18:42:55.476Z"},"exploitAvailable":true,"ingestedAt":"2026-10-07T18:42:20.869Z","slug":"CVE-2015-6420","body":"## Overview\n\nSerialized-object interfaces in certain Cisco Collaboration and Social Media; Endpoint Clients and Client Software; Network Application, Service, and Acceleration; Network and Content Security Devices; Network Management and Provisioning; Routing and Switching - Enterprise and Service Provider; Unified Computing; Voice and Unified Communications Devices; Video, Streaming, TelePresence, and Transcoding Devices; Wireless; and Cisco Hosted Services products allow remote attackers to execute arbitrary commands via a crafted serialized Java object, related to the Apache Commons Collections (ACC) library.\n\n## Affected\n\n- `commons_collections >= 3.0, < 3.2.2`\n- `commons_collections = 4.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `commons_collections 3.2.2`","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":53.9,"likelihood":3.8,"exploitation":12,"ransomware":0},"changes":[]}