CVE-2006-4775

N/A Unknown
Published: September 14, 2006 Modified: April 16, 2026
View on NVD

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://secunia.com/advisories/21896
Source: cve@mitre.org
Vendor Advisory
http://secunia.com/advisories/21902
Source: cve@mitre.org
Vendor Advisory
http://securitytracker.com/id?1016843
Source: cve@mitre.org
http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
Source: cve@mitre.org
Patch
http://www.kb.cert.org/vuls/id/175148
Source: cve@mitre.org
US Government Resource
http://www.osvdb.org/28776
Source: cve@mitre.org
http://www.phenoelit.de/stuff/CiscoVTP.txt
Source: cve@mitre.org
http://www.securityfocus.com/archive/1/445896/100/0/threaded
Source: cve@mitre.org
http://www.securityfocus.com/archive/1/445938/100/0/threaded
Source: cve@mitre.org
http://www.securityfocus.com/bid/19998
Source: cve@mitre.org
http://www.vupen.com/english/advisories/2006/3600
Source: cve@mitre.org
Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/28925
Source: cve@mitre.org
http://secunia.com/advisories/21896
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://secunia.com/advisories/21902
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://securitytracker.com/id?1016843
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
http://www.kb.cert.org/vuls/id/175148
Source: af854a3a-2127-422b-91ae-364da2661108
US Government Resource
http://www.osvdb.org/28776
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.phenoelit.de/stuff/CiscoVTP.txt
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/archive/1/445896/100/0/threaded
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/archive/1/445938/100/0/threaded
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/bid/19998
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.vupen.com/english/advisories/2006/3600
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/28925
Source: af854a3a-2127-422b-91ae-364da2661108

24 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
6.3%
91th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-399

Affected Vendors

cisco

Related CVEs

CVE-2026-4049 N/A
CVE-2026-41455 8.5
CVE-2026-41454 8.3
CVE-2026-41314 N/A
CVE-2026-41313 N/A