CVE-2006-4775: Cisco Catos
High severity, CVSS 7.8. EPSS: 5% chance of exploitation in the next 30 days.
The VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) and CatOS allows remote attackers to cause a denial of service by sending a VTP update with a revision value of 0x7FFFFFFF, which is incremented to 0x80000000 and is interpreted as a negative number in a signed context.
Affected products
Published 2006-09-14. Last modified 2026-06-16.