CVE-1999-1129

Severity Score

9.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

1999-09-01 CVE Published
2001-08-31 CVE Reserved
2024-08-01 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (4)

URL	Tag	Source
https://exchange.xforce.ibmcloud.com/vulnerabilities/3294	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://www.securityfocus.com/archive/1/26008	2017-12-19
http://www.securityfocus.com/bid/615	2017-12-19

URL	Date	SRC
http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/1928v8x/eescg8x/aleakyv.htm	2017-12-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				11.2\(8\)sa5 Search vendor "Cisco" for product "Ios" and version "11.2\(8\)sa5"		-		Affected
Cisco Search vendor "Cisco"		Catalyst 2900 Vlan Search vendor "Cisco" for product "Catalyst 2900 Vlan"				*		-		Affected