CVE-2020-12521

MEDIUM

Phoenix Contact PLCnext Control Devices <2021.0 LTS - DoS

Title source: llm
STIX 2.1

Description

On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot.

References (1)

Core 1
Core References
Third Party Advisory x_refsource_confirm
https://cert.vde.com/en-us/advisories/vde-2020-049

Scores

CVSS v3 6.5
EPSS 0.0045
EPSS Percentile 36.1%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (1)
phoenixcontact/plcnext_firmware < 2021.0
Published Dec 17, 2020
Tracked Since Feb 18, 2026