CVE-2015-6420: vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-08 00:03 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by cisco, published 2015-12-15).
Weakness: CWE-502 Deserialization of Untrusted Data
How it can be exploited
Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: yes. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer found 1 code repository naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 10 references on Exploit Observer
Live scores
- EPSS
- 0.242
likely to be attacked soon - VEDAS
- 0.926
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- No public rule yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Not stated | versions not stated in the record | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Vendor guidance:
- 20151209 Vulnerability in Java Deserialization Affecting Cisco Products (vendor-advisory, x_refsource_CISCO)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
References
Vendor advisories and patches
- 20151209 Vulnerability in Java Deserialization Affecting Cisco Products (vendor-advisory, x_refsource_CISCO)
Technical analysis and advisories
- VU#581311 (third-party-advisory, x_refsource_CERT-VN)
Other references
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (x_refsource_CONFIRM)
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917 (x_refsource_CONFIRM)
- 78872 (vdb-entry, x_refsource_BID)
- https://www.tenable.com/security/research/tra-2017-23 (x_refsource_MISC)
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 (x_refsource_CONFIRM)
- https://www.tenable.com/security/research/tra-2017-14 (x_refsource_MISC)
- [samza-commits] 20210310 [GitHub] [samza] Telesia opened a new pull request #1471: SAMZA-2630: Upgrade dependencies for security fixes (mailing-list, x_refsource_MLIST)
- https://www.kb.cert.org/vuls/id/576313
- https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/
- https://news.apache.org/foundation/entry/apache_commons_statement_to_widespread
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
Supporting partners
