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CVE-2005-4826
Unspecified vulnerability in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(22)EA3 on Catalyst 2950T switches allows remote…
- 6.1MediumCVSS base score
- 1.0%Exploitation in 30 daysEPSS · top 36% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Unspecified vulnerability in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(22)EA3 on Catalyst 2950T switches allows remote attackers to cause a denial of service (device reboot) via a crafted Subset-Advert message packet, a different issue than CVE-2006-4774, CVE-2006-4775, and CVE-2006-4776.
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.1 | AV:A/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 1.0% · top 36% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
n/a
- affected n/a
References
11
- 1017568 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 23892 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 33013 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20070129 Cisco VTP Vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- ADV-2007-0414 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- oval:org.mitre.oval:def:5544 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 20070130 Re: [Full-disclosure] S21sec-034-en: Cisco VTP DoS vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://www.blackhat.com/html/bh-europe-05/bh-eu-05-speakers.html#Berrueta (opens in a new tab)x_refsource_MISCx_transferred
- 22268 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.s21sec.com/en/avisos/s21sec-034-en.txt (opens in a new tab)x_refsource_MISCx_transferred
- 20070126 S21sec-034-en: Cisco VTP DoS vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_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)
- EUVD EUVD-2005-4819 (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://cveledger.app/cve/CVE-2005-4826)Record last updated .