CVE-2019-5173

highpriority · track · 31EPSS 0.014 · 71 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.36% (71st) EPSS

CVSS 7.2 · high

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · wago_psirt

EPSS · scored 2026-10-26

An exploitable command injection vulnerability exists in the iocheckd service ‘I/O-Check’ function of the WAGO PFC 200 Firmware version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can be used to inject OS commands. An attacker can send a specially crafted packet to trigger the parsing of this cache file. At 0x1e9fc the extracted state value from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=X1 state=<contents of state node> using sprintf(). This command is later executed via a call to system().

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedwago_psirt
The I/O-Check service protocol is only needed during installation and commissioning, not during normal operations. It is highly recommended to disable the I/O-Check service after commissioning. This is the easiest and securest way to protect your device from the listed vulnerabilities. Regardless of the action described above, the vulnerabilities are expected to be fixed in FW16 Release in Q2/2020.
Mitigationwago_psirt
* Disable I/O-Check service. * Restrict network access to the device. * Do not directly connect the device to the internet. * Disable unused TCP/UDP-ports.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT DE

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USprimaryCWE-78US

affected products (7)

Products and version ranges known to be affected.

WAGO WAGO PFC200≤ Firmware version 03.02.02(14)enisa_euvdEU
wago pfc200 firmware= 03.02.02(14)nvdUScpe:2.3:o:wago:pfc200_firmware:*:*:*:*:*:*:*:*
Firmware <FW16 installed on Hardware 750-81xx/xxx-xxx (PFC100)all versionswago_psirtDE
Firmware <FW16 installed on Hardware 750-82xx/xxx-xxx (PFC200)all versionswago_psirtDE
Firmware <FW16 installed on Hardware 762-4xxxall versionswago_psirtDE
Firmware <FW16 installed on Hardware 762-6xxxall versionswago_psirtDE
Firmware <FW16 installed on Pepperl+Fuchs Hardware 762-5xxxall versionswago_psirtDE

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2020-011WAGO: Multiple Vulnerabilities in I/O-Check Service2020-03-09csaf · wago_psirtDE
An attacker needs an authorized login on the device in order to exploit the herein mentioned vulnerabilities. The reported vulnerabilities allow a local attacker with valid login credentials who is able to create files on the device to change the devices settings, e.g. default gateway address, time server etc. and potentially execute code.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd wago_psirt NVD CVE.org MITRE

published 2020-03-11modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2019-5173 cnnvd
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0962 cnnvd
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0962 enisa_euvd
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0962ExploitMitigationTechnical DescriptionThird Party Advisorynvd

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