CVE-2016-6384: Cisco IOS

High severity, CVSS 7.5. EPSS: 4.2% chance of exploitation in the next 30 days.

Cisco IOS 12.2 through 12.4 and 15.0 through 15.6 and IOS XE 3.1 through 3.17 and 16.2 allow remote attackers to cause a denial of service (device reload) via crafted fields in an H.323 message, aka Bug ID CSCux04257.

Affected products

• Cisco IOS: from 12.2, up to and including 12.4; from 15.0, up to and including 15.6
• Cisco IOS XE: from 3.1, up to and including 3.17; version 16.2 only

Published 2016-10-05. Last modified 2026-06-17.