Unrated severityNVD Advisory· Published Nov 6, 2008· Updated Jun 16, 2026

CVE-2008-4963

Description

Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Catos2 versions
cpe:2.3:o:cisco:catos:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:catos:*:*:*:*:*:*:*:*
- (no CPE)
Cisco Systems, Inc./Cisco iOS2 versions
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
- (no CPE)

Patches

Vulnerability mechanics

References

secunia.com/advisories/32573nvdVendor Advisory
www.cisco.com/en/US/products/products_security_response09186a0080a231cf.htmlnvdVendor Advisory
osvdb.org/49601nvd
securitytracker.com/idnvd
www.securityfocus.com/bid/32120nvd
www.securitytracker.com/idnvd
exchange.xforce.ibmcloud.com/vulnerabilities/46346nvd

News mentions

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