What is CVE-2016-6414?

CVE-2016-6414 is a high-severity vulnerability in Cisco iOS, classified under OS Command Injection. CVSS score: 7.8/10. Published 2016-09-22.

How severe is CVE-2016-6414?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Cisco iOS

CVE-2016-6414

iox in Cisco IOS, possibly 15.6 and earlier, and IOS XE, possibly 3.18 and earlier, allows local users to execute arbitrary IOx Linux commands on the guest OS via crafted iox command-line options, aka Bug ID CSCuz59223.

Vulnerability class: Command Injection (OS Command Injection)

Published 2016-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Cisco iOS — versions 15.6\(1\)t1, 15.6(1)t1

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.securitytracker.com/id/1036876 (vdb-entry)
www.securityfocus.com/bid/93091 (vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160921… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2016-6414?: CVE-2016-6414 is a high-severity vulnerability in Cisco iOS, classified under OS Command Injection. CVSS score: 7.8/10. Published 2016-09-22.
How severe is CVE-2016-6414?: High severity. CVSS v3 base score is 7.8 out of 10.