CVE-2019-1758

Cisco IOS Software Catalyst 6500 Series 802.1x Authentication Bypass Vulnerability

MEDIUM
4.7
CVSS Score
Published: March 28, 2019 at 12:20 AM UTC
Updated: June 17, 2026 at 02:29 AM UTC
1 product affected across 1 vendorIOS

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

A vulnerability in 802.1x function of Cisco IOS Software on the Catalyst 6500 Series Switches could allow an unauthenticated, adjacent attacker to access the network prior to authentication. The vulnerability is due to how the 802.1x packets are handled in the process path. An attacker could exploit this vulnerability by attempting to connect to the network on an 802.1x configured port. A successful exploit could allow the attacker to intermittently obtain access to the network.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMcisco
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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