A vulnerability in the PROFINET handler for Link Layer Discovery Protocol (LLDP) messages of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a crash on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of LLDP messages in the PROFINET LLDP message handler. An attacker could exploit this vulnerability by sending a malicious LLDP message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload.
Metrics
No CVSS v4.0
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
Access Vector Adjacent Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
Exploitation none
Automatable no
Technical Impact partial
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Cisco |
|
Configuration 1 [-]
| AND |
|
No data.
References
History
Wed, 25 Feb 2026 07:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Status: PUBLISHED
Assigner: cisco
Published: 2020-09-24T17:51:35.464Z
Updated: 2024-11-13T18:00:50.458Z
Reserved: 2019-12-12T00:00:00.000Z
Link: CVE-2020-3512
Updated: 2024-08-04T07:37:54.412Z
Status : Modified
Published: 2020-09-24T18:15:21.323
Modified: 2024-11-21T05:31:13.510
Link: CVE-2020-3512
No data.