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01 Record

CVE-2021-34594

Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server

MediumPUBLISHEDCNA: CERTVDE
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

02 Description

Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server

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
1.12% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 66.1% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/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
2021-11-04 09:50Z4 YR AGO
Last updated
2024-09-16 22:03Z2 YR AGO
Reserved
2021-06-10
Assigning CNA
CERTVDE
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Weaknesses
  • CWE-23Relative Path TraversalBase
  • CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
Data version
5.1
Document digest
5be242e3f330ba3cfef97b36cd128329f4f29d1cdf370531ad6872906e7f2646

05 Affected products

VendorProductVersionsPlatforms
Beckhoff AutomationTwinCAT OPC UA ServerTF6100 to < 4.3.48.0, TS6100 to < 4.3.48.0, TcOpcUaServer version to < 3.2.0.19423—

06 References

07 Remediation

Please update to a recent version of the affected product (TF6100 or TS6100 version >= 4.3.48.0)