CVE-2015-6420
CRITICAL 9.8EPSS 18.8%
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 v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 18.76% chance of exploitation in the next 30 days, 97th percentile
- Published
- 2015-12-15
- Updated
- 2026-10-07
Proof-of-concept exploits (3)
- https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-…
- AndreaRamirez17/POC_bckup0★ · 2025-08-22
- Leeziao/CVE-2015-64200★ · 2025-04-16
Security advisories
- https://lists.apache.org/thread.html/r352e40ca9874d1beb4ad95403792adca7eb295e6bc3bd7b65fa…
- https://news.apache.org/foundation/entry/apache_commons_statement_to_widespread
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-ja…
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.securityfocus.com/bid/78872
- https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-…
- 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
- https://www.kb.cert.org/vuls/id/576313
- https://www.kb.cert.org/vuls/id/581311
- https://www.tenable.com/security/research/tra-2017-14
- https://www.tenable.com/security/research/tra-2017-23
- advisories/GHSA-6hgm-866r-3cjv