CVE-2021-34597

Name: CVE-2021-34597
Creator: NVD / NIST
Published: 2021-11-04T10:15:07.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2021-34597 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Improper Input Validation vulnerability in PC Worx Automation Suite of Phoenix Contact up to version 1.88 could allow an attacker with a manipulated project file to unpack arbitrary files outside of the selected project directory.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

Improper Input Validation vulnerability in PC Worx Automation Suite of Phoenix Contact up to version 1.88 could allow an attacker with a manipulated project file to unpack arbitrary files outside of the selected project directory.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.63%

45.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Phoenixcontact	Pc Worx	<= 1.88
Phoenixcontact	Pc Worx Express	<= 1.88

References

https://cert.vde.com/en/advisories/VDE-2021-052/Mitigation, Third Party Advisory
https://cert.vde.com/en/advisories/VDE-2021-052/Mitigation, Third Party Advisory

Timeline

Published: Nov 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34597?

How severe is CVE-2021-34597?

CVE-2021-34597 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34597?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34597?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST