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01 Record

CVE-2021-34570

Phoenix Contact: DoS for PLCnext Control devices in versions prior to 2021.0.5 LTS

HighPUBLISHEDCNA: CERTVDE
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

Phoenix Contact: DoS for PLCnext Control devices in versions prior to 2021.0.5 LTS

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.97% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 61.7% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-09-27 08:25Z5 YR AGO
Last updated
2024-09-16 22:09Z2 YR AGO
Reserved
2021-06-10
Assigning CNA
CERTVDE
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-20Improper Input ValidationClass
Data version
5.1
Document digest
bab38ab90a44baad5b8113519940925b804e942aef85bae21351cf565f178357

05 Affected products

VendorProductVersionsPlatforms
Phoenix ContactAXC FAXC F 1152 (1151412) to < 2021.0.5 LTS, AXC F 2152 (2404267) to < 2021.0.5 LTS, AXC F 3152 (1069208) to < 2021.0.5 LTS, AXC F 2152 Starterkit (1046568) to < 2021.0.5 LTS—
Phoenix ContactRFCRFC 4072S (1051328) to < 2021.0.5 LTS—
Phoenix ContactPLCnextPLCnext Technology Starterkit (1188165) to < 2021.0.5 LTS—

06 References

07 Remediation

Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability.