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CVE-2006-4775
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…
High7.8EPSS 5.1%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 5.1% · top 7.6% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
n/a
- affected n/a
References (12)
- http://www.phenoelit.de/stuff/CiscoVTP.txt (opens in a new tab)x_refsource_MISCx_transferred
- 21896 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 19998 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 28776 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20060913 Cisco VLAN Trunking Protocol Vulnerabilities (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- 1016843 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 20060913 Re: Cisco IOS VTP issues (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- ADV-2006-3600 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- cisco-ios-vtp-wrap-config-manipulation(28925) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- VU#175148 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- 20060913 Cisco IOS VTP issues (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 21902 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2006-4775)Record last updated .