Is CVE-2021-34594 in the CISA KEV catalog?

No. CVE-2021-34594 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34594?

CVE-2021-34594 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-34594?

CVE-2021-34594 has an EPSS score of 1.09% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34594?

Upgrade tf6100 firmware to 4.3.48.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34594

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-23 CWE-22Path Traversal

How to fix

Remediation Available

tf6100 firmwareNVD

Affected:< 4.3.48.0Fixed in:4.3.48.0CVE-2021-34594derived from NVD

ts6100 firmwareNVD

Affected:< 4.3.48.0Fixed in:4.3.48.0CVE-2021-34594derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Exploit Intelligence

1.09%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Mitigation1

cert.vde.com

Related Vulnerabilities

Other CWE-23 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-27199	High	7.3	100%	KEV + Ransom	Fix
CVE-2020-5410	High	7.5	96%	KEV	Fix
CVE-2021-40870	Critical	9.8	92%	KEV	Fix
CVE-2025-64446	Critical	9.8	89%	KEV	Fix
CVE-2020-5405	Medium	6.5	69%	-	Fix
CVE-2025-55752	High	7.5	67%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.