Unrated severityNVD Advisory· Published Sep 14, 2006· Updated Jun 16, 2026
CVE-2006-4775
CVE-2006-4775
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 Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4cpe:2.3:o:cisco:catos:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:catos:*:*:*:*:*:*:*:*
- (no CPE)
cpe:2.3:o:cisco:ios:12.1\(19\):*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:12.1\(19\):*:*:*:*:*:*:*
- (no CPE)range: 12.1(19)
Patches
Vulnerability mechanics
References
12- www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtmlnvdPatch
- secunia.com/advisories/21896nvdVendor Advisory
- secunia.com/advisories/21902nvdVendor Advisory
- www.vupen.com/english/advisories/2006/3600nvdVendor Advisory
- www.kb.cert.org/vuls/id/175148nvdUS Government Resource
- securitytracker.com/idnvd
- www.osvdb.org/28776nvd
- www.phenoelit.de/stuff/CiscoVTP.txtnvd
- www.securityfocus.com/archive/1/445896/100/0/threadednvd
- www.securityfocus.com/archive/1/445938/100/0/threadednvd
- www.securityfocus.com/bid/19998nvd
- exchange.xforce.ibmcloud.com/vulnerabilities/28925nvd
News mentions
0No linked articles in our index yet.