CVE Tools
Sign in

CVE-2021-34594

Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server

Published: Nov 4, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-23
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
1.1%
Top 39.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-23CWE-22

Affected Products

TF6100Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TS6100Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TcOpcUaServerBeckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TwinCAT OPC UA ServerBeckhoff Automation
On-prem
ICS / OT / IoT / plc-scada-hmi
tf6100 firmwarebeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
beckhoff automation gmbh & co. kgcommercialDEICS / OT / IoTaka beckhoff, twincat
beckhoff automationcommercialDEICS / OT / IoTaka beckhoff.device.manager.xar, mdp for beckhoff rt linux, twincat/bsd
beckhoffcommercialICS / OT / IoTaka twincat, twincat/bsd
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-003.pdf
download.beckhoff.com
https://cert.vde.com/en/advisories/VDE-2021-051/
cert.vde.com

Timeline

Published
Nov 4, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-34594 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows