CVE-2021-34570

HIGH

Phoenix Contact PLCnext Control Devices < 2021.0.5 - Denial of Service via Crafted JSON Request

Title source: llm
STIX 2.1

Description

Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests.

References (1)

Core 1
Core References
Patch, Third Party Advisory x_refsource_confirm
https://cert.vde.com/en/advisories/VDE-2021-029/

Scores

CVSS v3 7.5
EPSS 0.0095
EPSS Percentile 56.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (6)
phoenixcontact/axc_f_1152_firmware < 2021.0.5
phoenixcontact/axc_f_2152_firmware < 2021.0.5
phoenixcontact/axc_f_2152_starterkit_firmware < 2021.0.5
phoenixcontact/axc_f_3152_firmware < 2021.0.5
phoenixcontact/plcnext_technology_starterkit_firmware < 2021.0.5
phoenixcontact/rfc_4072s_firmware < 2021.0.5
Published Sep 27, 2021
Tracked Since Feb 18, 2026