CVE-1999-1129 json
Cisco Catalyst 2900 Virtual LAN (VLAN) switches allow remote attackers to inject 802.1q frames into another VLAN by forging the VLAN identi…
published 27y ago modified 4mo ago also EUVD-1999-1110
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
Cisco Catalyst 2900 Virtual LAN (VLAN) switches allow remote attackers to inject 802.1q frames into another VLAN by forging the VLAN identifier in the trunking tag.
Patch / fix
- securityfocus.com/archive/1/26008 advisory
- securityfocus.com/bid/615 advisory
Is CVE-1999-1129 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.59% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Technology feeds
References
-
securityfocus.com
/archive/1/26008
mailing-list, patch, vendor-advisory
-
securityfocus.com
/bid/615
vdb-entry, patch, vendor-advisory
-
cisco.com
/univercd/cc/td/doc/product/lan/28201900/1928v8x/eescg8x/aleakyv.htm
vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/3294
vdb-entry
Sources
- CVE List CVE-1999-1129
- NVD CVE-1999-1129
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.