CVE Catalog

CVE-1999-1129

High
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
1.60%

73th percentile - higher than 73% of all known CVEs

Summary

Cisco Catalyst 2900 VLAN switches allow remote attackers to inject 802.1q frames into another VLAN by forging the VLAN identifier in the trunking tag.

Risk Assessment

Attackers may gain access to data from other VLANs, potentially compromising the confidentiality and integrity of information within the network.

Recommendation

It is recommended to update the switch firmware and implement appropriate security measures to prevent VLAN identifier spoofing.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS