CVE-2014-2146: Cisco IOS

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

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.

Affected products

• Cisco IOS: up to and including 15.4\(1\)t1
• Cisco IOS XE: up to and including 15.4\(3\)s

Published 2016-09-22. Last modified 2026-06-17.