CVE-2020-12511

Pepperl+Fuchs IO-Link Master — vulnerability CVE-2020-12511

Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a Cross-Site Request Forgery (CSRF) in the web interface.

CVSS 8.8Patch available

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

Vendor

Pepperl+Fuchs

Products

IO-Link Master, IO-Link Master DR, System image, U-Boot bootloader

up to version <=v1.5.48

Published

22 January 2021

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

Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a Cross-Site Request Forgery (CSRF) in the web interface.

CVSS 3.1 — vector details

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

Attack vector

NETWORK

Privileges required

NONE

User interaction

REQUIRED

Confidentiality

High

Integrity

High

Availability

High

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.6%

Percentile

48e

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

Patch information

In order to prevent the exploitation of the reported vulnerabilities, we recommend that the affected units be updated with the following three firmware packages: - U-Boot bootloader version 1.36 - System image version 1.52 - Application base version 1.6.11

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

51/ 100

Based on CVSS 8.8, EPSS 0.6%, industrial relevance 45/100; raised due to relevance to internet exposure.

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

•Network access to the affected device or segment is required.
•No valid credentials are needed.
•User interaction (for example opening a file) is required.

Operational impact & energy relevance

Possible loss of visibility of or control over the process upon successful exploitation.

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

This product uses protocols that are relevant to internet exposure analysis. An internet-reachable service is not automatically vulnerable.

Recommended defensive measures

•Apply the latest firmware or software update and validate its integrity.
•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).
•Monitor for abnormal protocol traffic using an OT-aware detection system.

Industrial relevance score

45/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Description mentions industrial protocol: https.

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 62443-4-1FR3 · Systeemintegriteit

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

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