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Vulnerability record · CVE-2015-6420 · published 15 December 2015

CVE-2015-6420: Apache commons collections deserialization of untrusted data vulnerability

Apache · Commons Collections

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.

9.8 CVSS 3.1 Critical EPSS 19% · top 2.8% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.1 base score, v2 7.5
19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
21References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html Third Party Advisory
http://www.securityfocus.com/bid/78872 Third Party AdvisoryVDB Entry
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 Third Party Advisory
https://lists.apache.org/thread.html/r352e40ca9874d1beb4ad95403792adca7eb295e6bc3bd7b65fabcc21%40%3Ccommits.samza.apache Vendor Advisory
https://www.kb.cert.org/vuls/id/581311 Third Party Advisory
https://www.tenable.com/security/research/tra-2017-14 Third Party Advisory
https://www.tenable.com/security/research/tra-2017-23 Third Party Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html Third Party Advisory
http://www.securityfocus.com/bid/78872 Third Party AdvisoryVDB Entry
https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-co ExploitThird Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 Third Party Advisory
https://lists.apache.org/thread.html/r352e40ca9874d1beb4ad95403792adca7eb295e6bc3bd7b65fabcc21%40%3Ccommits.samza.apache Vendor Advisory
https://news.apache.org/foundation/entry/apache_commons_statement_to_widespread Vendor Advisory
https://www.kb.cert.org/vuls/id/576313 Third Party Advisory
https://www.kb.cert.org/vuls/id/581311 Third Party Advisory
https://www.tenable.com/security/research/tra-2017-14 Third Party Advisory
https://www.tenable.com/security/research/tra-2017-23 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2015-6420), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.