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 1999-09-01 27 y ago modified 2026-06-16 4 mo 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 75%
- 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
Exploit prediction
1.59% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
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
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