{"cve":"CVE-2015-6420","nvd":{"published":"2015-12-15T05:59:07.823","modified":"2026-10-07T18:17:07.410","status":"Modified","description":"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; 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization","http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","http://www.securityfocus.com/bid/78872","https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917","https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722"],"products":["apache:commons_collections"],"source":"nvd","synced_at":"2026-10-19T20:37:48.328043465+00:00"},"epss":{"cve":"CVE-2015-6420","score":0.15204,"percentile":0.96729,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6hgm-866r-3cjv","url":"https://osv.dev/vulnerability/GHSA-6hgm-866r-3cjv","summary":"Insecure Deserialization in Apache Commons Collection","modified":"2024-11-28T05:40:45.267146Z","packages":[{"ecosystem":"Maven","name":"org.apache.commons:commons-collections4","purl":"pkg:maven/org.apache.commons/commons-collections4","ranges":["<4.1"],"fixed":["4.1"]},{"ecosystem":"Maven","name":"commons-collections:commons-collections","purl":"pkg:maven/commons-collections/commons-collections","ranges":["<3.2.2"],"fixed":["3.2.2"]},{"ecosystem":"Maven","name":"net.sourceforge.collections:collections-generic","purl":"pkg:maven/net.sourceforge.collections/collections-generic","ranges":["<=4.0.1"],"fixed":[]},{"ecosystem":"Maven","name":"org.apache.servicemix.bundles:org.apache.servicemix.bundles.collections-generic","purl":"pkg:maven/org.apache.servicemix.bundles/org.apache.servicemix.bundles.collections-generic","ranges":["<=4.01"],"fixed":[]},{"ecosystem":"Maven","name":"org.apache.servicemix.bundles:org.apache.servicemix.bundles.commons-collections","purl":"pkg:maven/org.apache.servicemix.bundles/org.apache.servicemix.bundles.commons-collections","ranges":["<=3.2.1"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}