CVE-2008-4963

Name: CVE-2008-4963
Creator: NVD / NIST
Published: 2008-11-06T15:55:51.713+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.68%

Last modified Jun 16, 2026

CVE-2008-4963 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.68% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.68%

74.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Catos	All versions
Cisco	Ios	All versions

References

Timeline

Published: Nov 6, 2008
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2008-4963?

How severe is CVE-2008-4963?

Severity scoring for CVE-2008-4963 is pending analysis. The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.

How do I fix CVE-2008-4963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2008-4963?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST