CVE-2021-34597

mediumpriority · track · 27EPSS 0.007 · 51 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.65% (51st) EPSS

CVSS 6.8 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · phoenix_contact_psirt

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedphoenix_contact_psirt
With the next version of Automation Worx Software Suite additional plausibility checks for archive content will be implemented.
Mitigationphoenix_contact_psirt
We strongly recommend customers to exchange project files only using secure file exchange services. Project files should not be exchanged via unencrypted email. In addition, we recommend exchanging or storing project files together with a checksum to ensure their integrity.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · info@cert.vde.comexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · Phoenix Contact PSIRT DE

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US

affected products (6)

Products and version ranges known to be affected.

PHOENIX CONTACT PC Worx≤ PC Worx ≤1.88enisa_euvdEU
PHOENIX CONTACT PC Worx≤ PC Worx-Express ≤1.88enisa_euvdEU
phoenixcontact pc worx≤ 1.88nvdUScpe:2.3:a:phoenixcontact:pc_worx:*:*:*:*:*:*:*:*
phoenixcontact pc worx express≤ 1.88nvdUScpe:2.3:a:phoenixcontact:pc_worx_express:*:*:*:*:*:*:*:*
Firmware <=1.88 installed on PHOENIX CONTACT PC Worxall versionsphoenix_contact_psirtDE
Firmware <=1.88 installed on PHOENIX CONTACT PC Worx Expressall versionsphoenix_contact_psirtDE

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2021-052PHOENIX CONTACT: PC Worx/-Express prone to improper input validation vulnerability2021-11-03csaf · phoenix_contact_psirtDE
PC Worx / -Express is vulnerable to a 'zip slip' style vulnerability when loading a project file.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd phoenix_contact_psirt NVD CVE.org MITRE

published 2021-11-04modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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