CVE-2005-4826: Cisco IOS

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

Unspecified vulnerability in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(22)EA3 on Catalyst 2950T switches allows remote attackers to cause a denial of service (device reboot) via a crafted Subset-Advert message packet, a different issue than CVE-2006-4774, CVE-2006-4775, and CVE-2006-4776.

Affected products

• Cisco IOS: version 12.1(22)ea3 only

Published 2005-12-31. Last modified 2026-06-16.