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Vulnerability record · CVE-2021-34597 · published 4 November 2021

CVE-2021-34597: Phoenixcontact pc worx improper input validation vulnerability

Phoenixcontact · Pc Worx

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.

7.8 CVSS 3.1 High EPSS 0.65% · top 50.7% CWE-20 · Improper input validation
7.8CVSS 3.1 base score, v2 6.8
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert.vde.com/en/advisories/VDE-2021-052/ MitigationThird Party Advisory
https://cert.vde.com/en/advisories/VDE-2021-052/ MitigationThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-46141Phoenixcontact automationworx software suite incorrect permission assignment vulnerabilityIncorrect Permission Assignment for Critical Resource vulnerability in multiple products of the PHOENIX CONTACT classic line allow an remote unauthen…EPSS 0.88%7.8CVE-2020-12497Phoenixcontact pc worx stack-based buffer overflow vulnerabilityPLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC W…EPSS 15%7.8CVE-2020-12498Phoenixcontact pc worx stack-based buffer overflow vulnerabilitymwe file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier is vulnerable to out-of-bounds read remote code execution. M…EPSS 2.1%7.8CVE-2019-16675Phoenixcontact config\+ out-of-bounds read vulnerabilityAn issue was discovered in PHOENIX CONTACT PC Worx through 1.86, PC Worx Express through 1.86, and Config+ through 1.86. A manipulated PC Worx or Con…EPSS 3.3%7.5CVE-2023-46143Phoenixcontact automationworx software suite download of code without integrity check vulnerabilityDownload of Code Without Integrity Check vulnerability in PHOENIX CONTACT classic line PLCs allows an unauthenticated remote attacker to modify some …EPSS 0.33%7.0CVE-2021-33542Phoenixcontact config\+ vulnerabilityPhoenix Contact Classic Automation Worx Software Suite in Version 1.87 and below is affected by a remote code execution vulnerability. Manipulated PC…EPSS 1.8%9.5CVE-2026-88771Citrix NetScaler Improper Input Validation VulnerabilityImproper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-…KEV9.5CVE-2026-93952Arista velocloud orchestrator improper input validation vulnerabilityVeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality an…KEVEPSS 0.90%

Source: NIST National Vulnerability Database (record CVE-2021-34597), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.