What is CVE-2014-2146?

CVE-2014-2146 is a medium-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2016-09-22.

How severe is CVE-2014-2146?

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

Improper input validation in Cisco iOS

CVE-2014-2146

The Zone-Based Firewall (ZBFW) functionality in Cisco IOS, possibly 15.4 and earlier, and IOS XE, possibly 3.13 and earlier, mishandles zone checking for existing sessions, which allows remote attackers to bypass intended resource-access restrictions via spoofed traffic that matches one of these sessions, aka Bug IDs CSCun94946 and CSCun96847.

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

Published 2016-09-22 · 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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (68.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/93126 (vdb-entry)
tools.cisco.com/security/center/viewAlert.x (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2014-2146?: CVE-2014-2146 is a medium-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2016-09-22.
How severe is CVE-2014-2146?: Medium severity. CVSS v3 base score is 6.5 out of 10.