CVE-2008-4963
Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2008-4963- CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2008-4963- Updated
- 2026-11-02
EUVDEUVD-2008-4942 No score
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.
- Record
EUVD-2008-4942- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7hp5-2w63-5xvj No score
Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and...
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.
- Record
GHSA-7hp5-2w63-5xvj- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2008-4963 is a high vulnerability (CVSS 7.1) in Cisco Catos, published November 6, 2008. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.68%, the 77th percentile. No source names a fixed version.
References
secunia.com/advisories/32573
cisco.com/en/US/products/products_security_response09186a0080a231cf.html
securitytracker.com/id?1021143
securitytracker.com/id?1021144
exchange.xforce.ibmcloud.com/vulnerabilities/46346
securityfocus.com/bid/32120
osvdb.org/49601
nvd.nist.gov/vuln/detail/CVE-2008-4963
github.com/advisories/GHSA-7hp5-2w63-5xvj