CVE-2019-5161Public exploitNetwork attack vector

Root code execution via unsigned update hook

Published Mar 10, 2020 · Updated Aug 4, 2024

Remote code execution in WAGO PFC200 Firmware 03.00.39(12), 03.01.07(13), and 03.02.02(14) allows remote authenticated users to run code as root. The Cloud Connectivity firmware-update parser accepts an unvalidated TargetPath, downloads a supplied script as /tmp/fwupdate/fwupdate_hook.sh, and executes it before signature verification. Web administrator privileges and configuration of the service to an attacker-controlled Azure IoT Hub are required; exploitation grants root command execution on the controller.

CVSS severity9.1
Critical
EPSS probability2.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in WAGO PFC200 Firmware 03.00.39(12), 03.01.07(13), and 03.02.02(14) allows remote authenticated users to run code as root. The Cloud Connectivity firmware-update parser accepts an unvalidated TargetPath, downloads a supplied script as /tmp/fwupdate/fwupdate_hook.sh, and executes it before signature verification. Web administrator privileges and configuration of the service to an attacker-controlled Azure IoT Hub are required; exploitation grants root command execution on the controller.

The record

CVE
CVE-2019-5161
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
WAGO
Product
WAGO PFC200 Firmware
Classifications
CWE-646, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=version 03.00.39(12)
  2. Affected versionversion=version 03.01.07(13)
  3. Affected versionversion=version 03.02.02(14)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WAGO · WAGO PFC200 Firmwareversion=version 03.00.39(12); version=version 03.01.07(13); version=version 03.02.02(14)

Published CVSS scores

9.1Cisco TalosCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-646Reliance on File Name or Extension of Externally-Supplied File
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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