CVE-2006-4775
The VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) and CatOS allows remote attackers...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2006-4775- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2006-4775- Updated
- 2026-11-02
EUVDEUVD-2006-4762 No score
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.
- Record
EUVD-2006-4762- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w58x-5ghh-784p No score
The VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) and CatOS allows remote attackers...
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.
- Record
GHSA-w58x-5ghh-784p- 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-2006-4775 is a high vulnerability (CVSS 7.8) in Cisco Catos, published September 14, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.14%, the 92nd percentile. No source names a fixed version.
References
phenoelit.de/stuff/CiscoVTP.txt
secunia.com/advisories/21896
securityfocus.com/bid/19998
osvdb.org/28776
cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
securitytracker.com/id?1016843
Show 8 moreShow less
vupen.com/english/advisories/2006/3600
exchange.xforce.ibmcloud.com/vulnerabilities/28925
kb.cert.org/vuls/id/175148
nvd.nist.gov/vuln/detail/CVE-2006-4775
github.com/advisories/GHSA-w58x-5ghh-784p