CVE-2019-5184Public exploit

Service crash via repeated gateway pointer free

Published Mar 23, 2020 · Updated Aug 4, 2024

Double free in the iocheckd I/O-Check service in WAGO PFC200 firmware 03.02.02(14) allows local users to crash the service. While parsing gateway nodes from /tmp/iocheckCache.xml, iocheckd frees the same heap pointer once per gateway entry instead of once after the loop. A local user must write the XML file and send BC_SaveParameter; exploitation interrupts network-configuration operations until recovery, while allocator behavior can enable code execution.

CVSS severity7.0
High
EPSS probability0.85%
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

Double free in the iocheckd I/O-Check service in WAGO PFC200 firmware 03.02.02(14) allows local users to crash the service. While parsing gateway nodes from /tmp/iocheckCache.xml, iocheckd frees the same heap pointer once per gateway entry instead of once after the loop. A local user must write the XML file and send BC_SaveParameter; exploitation interrupts network-configuration operations until recovery, while allocator behavior can enable code execution.

The record

CVE
CVE-2019-5184
Published
Mar 23, 2020
Updated
Aug 4, 2024
Vendor
WAGO
Product
PFC200 Controller
Classifications
CWE-415, T0814
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 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=WAGO PFC200 Firmware version 03.02.02(14)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

WAGO · PFC200 Controllerversion=WAGO PFC200 Firmware version 03.02.02(14)

Published CVSS scores

7.0Cisco TalosCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/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-415Double Free
T0814Denial of Service

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