What is CVE-2016-6412?

CVE-2016-6412 is a medium-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2016-09-24.

How severe is CVE-2016-6412?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Cisco iOS

CVE-2016-6412

The Cisco Application-hosting Framework (CAF) component in Cisco IOS 15.6(1)T1 and IOS XE, when the IOx feature set is enabled, allows man-in-the-middle attackers to trigger arbitrary downloads via crafted HTTP headers, aka Bug ID CSCuz84773.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2016-09-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/93088 (vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160921… (vendor-advisory, Vendor Advisory)
www.securitytracker.com/id/1036874 (vdb-entry)

Frequently asked questions

What is CVE-2016-6412?: CVE-2016-6412 is a medium-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2016-09-24.
How severe is CVE-2016-6412?: Medium severity. CVSS v3 base score is 6.5 out of 10.