TI-1999-01077 Aliases CVE-1999-1129 GHSA-29q9-4h2h-9p7g

Cisco Catalyst 2900 Virtual LAN (VLAN) switches allow remote attackers to inject 802.1q…

LOW 36Published 2001-09-12 · Updated 2024-08-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Partial · Partial · Partial
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

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.

Why it matters now

EPSS 0.01588 75th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:11.2\(8\)sa5:::::::*	11.2(8)sa5	Vulnerable	Cisco
cpe:2.3:h:cisco:catalyst_2900_vlan::::::::	all versions	Vulnerable	Cisco

cpe:2.3:o:cisco:ios:11.2\(8\)sa5:*:*:*:*:*:*:* Versions 11.2(8)sa5 Vulnerable ·Cisco
cpe:2.3:h:cisco:catalyst_2900_vlan:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-1999-1129
2026-10-03 Alias added: GHSA-29q9-4h2h-9p7g

References

Advisory 1

http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/1928v8x/eescg8x/aleakyv.htm

TI-2012-03358 Cisco IOS before 15.3(1)T on Cisco 2900 devices, when a VWIC2-2MFT-T1/E1 card is… CVSS 2.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences