CVE-2019-5168Public exploit

Local command execution via unsanitized domainname

Published Mar 10, 2020 · Updated Aug 4, 2024

OS command injection in WAGO PFC200 Firmware 03.02.02(14) allows local users to execute arbitrary commands through an XML cache file. The iocheckd I/O-Check parser inserts the untrusted domainname node into an edit_dns_server command with sprintf, then passes the resulting string to system(). Low-privilege access is required to place and trigger the cache file, after which commands run in the service context and can read, alter, or interrupt controller operations.

CVSS severity8.8
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in WAGO PFC200 Firmware 03.02.02(14) allows local users to execute arbitrary commands through an XML cache file. The iocheckd I/O-Check parser inserts the untrusted domainname node into an edit_dns_server command with sprintf, then passes the resulting string to system(). Low-privilege access is required to place and trigger the cache file, after which commands run in the service context and can read, alter, or interrupt controller operations.

The record

CVE
CVE-2019-5168
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
WAGO
Product
WAGO PFC200 Firmware
Classifications
CWE-78, T1059
Attack vector
local
Privileges
authenticated

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 03.02.02(14)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

WAGO · WAGO PFC200 Firmwareversion=version 03.02.02(14)

Published CVSS scores

8.8Cisco TalosCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.8INCIBE-CERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2INCIBE-CERTAV:L/AC:L/Au:N/C:C/I:C/A:C

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

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Your stack

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