CVE-2015-6420

CRITICAL
9.8
CVSS Score
Published: December 15, 2015 at 02:00 AM UTC
Updated: October 7, 2026 at 06:17 PM UTC
1 product affected across 1 vendorCommons Collections

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Severity
CRITICAL9.8
Exploit prediction
EPSS 15%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.0 ≤ v < 3.2.2*4.0

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-502

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