VULNERABILITY INTELLIGENCE

CVE-2020-3231

CVSS score4.7 MEDIUM
EPSS probability0.45%
CISA KEVNot currently listed
Published2020-06-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Description

A vulnerability in the 802.1X feature of Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches could allow an unauthenticated, adjacent attacker to forward broadcast traffic before being authenticated on the port. The vulnerability exists because broadcast traffic that is received on the 802.1X-enabled port is mishandled. An attacker could exploit this vulnerability by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication.

Weakness classification

  • CWE-284: Improper Access Control
  • CWE-863: Incorrect Authorization

Primary references