CVE-2019-5173Public exploit

Command execution via unsanitized XML state value

Published Mar 11, 2020 · Updated Aug 4, 2024

OS command injection in WAGO PFC200 firmware 03.02.02(14) allows local users to execute arbitrary commands through a crafted XML cache file. The iocheckd I/O-Check parser passes the unvalidated XML state value into an sprintf-built config_interfaces shell command that system() executes. Exploitation requires low-privileged access to write the cache file and trigger its parsing, enabling command execution with the service's access to controller data and functions.

CVSS severity8.8
High
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in WAGO PFC200 firmware 03.02.02(14) allows local users to execute arbitrary commands through a crafted XML cache file. The iocheckd I/O-Check parser passes the unvalidated XML state value into an sprintf-built config_interfaces shell command that system() executes. Exploitation requires low-privileged access to write the cache file and trigger its parsing, enabling command execution with the service's access to controller data and functions.

The record

CVE
CVE-2019-5173
Published
Mar 11, 2020
Updated
Aug 4, 2024
Vendor
WAGO
Product
WAGO PFC200
Classifications
CWE-78, T1059
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Firmware version 03.02.02(14)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

WAGO · WAGO PFC200version=Firmware version 03.02.02(14)

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Cisco TalosCVSS:3.0/AV:L/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo