CVE-2020-9403

Pepperl+Fuchs PACTware — vulnerability CVE-2020-9403

In PACTware before 4.1 SP6 and 5.x before 5.0.5.31, passwords are stored in a recoverable format, and may be retrieved by any user with access to the PACTware workstation.

CVSS 5.5Patch available

This record: live connection— last retrieved: 7 November 2026 at 03:37.

Vendor

Pepperl+Fuchs

Product

PACTware

up to version <=5.0.4xx

Published

11 August 2020

Last modified

17 June 2026

Original source information

Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.

Technical description

In PACTware before 4.1 SP6 and 5.x before 5.0.5.31, passwords are stored in a recoverable format, and may be retrieved by any user with access to the PACTware workstation.

CVSS 3.1 — vector details

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

Attack vector

LOCAL

Privileges required

LOW

User interaction

NONE

Confidentiality

High

Integrity

None

Availability

None

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.3%

Percentile

21e

Source: FIRST.org, updated on 6 November 2026.

Patch information

PACTware will protect the manipulation of stored passwords by using a salted mechanism of password encryption with an additional SHA256 hash. This will be fixed in following versions (and higher): * PACTware 5.0.5.31 * PACTware 4.1 SP6 Overview about version history: https://pactware.com/de/service You can protect yourself against manipulation by restricting the access to the PC where PACTware is installed. In case of not known passwords it can be reset by reinstallation of PACTware (all PACTware versions).

IACS Radar assessment

Our own interpretation and context for the source data above.

IACS Radar assessment

Our own interpretation and context for this vulnerability — not an official source.

IACS Radar priority score

33/ 100

Based on CVSS 5.5, EPSS 0.3%, industrial relevance 40/100.

Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.

Conditions for exploitation

•Local or adjacent access to the device is required.
•Limited user privileges are required.
•No user interaction required.

Operational impact & energy relevance

Limited impact on availability; the risk lies mainly with confidentiality or integrity of process data.

No strong energy-sector-specific signals recognised; general OT/ICS relevance.

Recommended defensive measures

•Change default or hardcoded credentials and restrict access to the management interface.
•Encrypt sensitive configuration and management communication.
•Restrict network access to the affected device to a dedicated OT management segment.
•Implement network segmentation in line with zones and conduits (IEC 62443-3-2).

Industrial relevance score

40/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.

Classification is provisional; manual verification by an OT security analyst is recommended.

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.

IEC 62443 mapping

IEC 62443-4-2FR1 · Identificatie- en authenticatiebeheerFR4 · Vertrouwelijkheid van gegevens

Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.

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