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CVE-2015-6420

Published: Dec 15, 2015Updated: Feb 24, 2026 Sources: CVE List NVD GHSA BDUCWE-502
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
18.8%
Top 3.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

commons collectionsapache
Mixed
Web & CMS Plugins / cms-core
org.apache.commons:commons-collections4MavenOSS Libraries
commons-collections:commons-collectionsMavenOSS Libraries
net.sourceforge.collections:collections-genericMavenOSS Libraries
org.apache.servicemix.bundles:org.apache.servicemix.bundles.collections-genericMavenOSS Libraries
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
mavenpackage-ecosystemOSS Libraries
and 25 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-java-deserialization
tools.cisco.com
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
oracle.com
http://www.securityfocus.com/bid/78872
securityfocus.com
and 15 more references View all →

Timeline

Published
Dec 15, 2015
Last Updated
Feb 24, 2026

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