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Vulnerability record · CVE-2019-5184 · published 23 March 2020

CVE-2019-5184: Wago pfc200 firmware double free vulnerability

Wago · Pfc200 Firmware

An exploitable double free vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. A specially crafted XML cache file written to a specific location on the device can cause a heap pointer to be freed twice, resulting in a denial of service and potentially code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.

7.8 CVSS 3.1 High EPSS 0.85% · top 43.6% CWE-415 · Double free
7.8CVSS 3.1 base score, v2 4.6
0.85%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An exploitable double free vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. A specially crafted XML cache file written to a specific location on the device can cause a heap pointer to be freed twice, resulting in a denial of service and potentially code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0965 ExploitMitigationThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0965 ExploitMitigationThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-1698WAGO Controllers OS Command Injection Allows Unauthenticated User CreationMultiple WAGO controller and touch panel firmware products contain an OS command injection flaw (CWE-78) that lets an unauthenticated, remote attacke…EPSS 82%analysed9.8CVE-2022-45138Wago 751-9301 firmware missing authentication for critical function vulnerabilityThe configuration backend of the web-based management can be used by unauthenticated users, although only authenticated users should be able to use t…EPSS 0.74%9.8CVE-2022-45140Wago 751-9301 firmware missing authentication for critical function vulnerabilityThe configuration backend allows an unauthenticated user to write arbitrary data with root privileges to the storage, which could lead to unauthentic…EPSS 1.1%9.8CVE-2019-5082Wago pfc200 firmware out-of-bounds write vulnerabilityAn exploitable heap buffer overflow vulnerability exists in the iocheckd service I/O-Check functionality of WAGO PFC200 Firmware version 03.01.07(13)…EPSS 3.3%9.8CVE-2018-5459Wago pfc200 firmware improper authentication vulnerabilityAn Improper Authentication issue was discovered in WAGO PFC200 Series 3S CoDeSys Runtime versions 2.3.X and 2.4.X. An attacker can execute different …EPSS 2.7%9.1CVE-2019-5160Wago pfc200 firmware vulnerabilityAn exploitable improper host validation vulnerability exists in the Cloud Connectivity functionality of WAGO PFC200 Firmware versions 03.02.02(14), 0…EPSS 2.7%9.1CVE-2019-5161Wago pfc200 firmware insufficient verification of data authenticity vulnerabilityAn exploitable remote code execution vulnerability exists in the Cloud Connectivity functionality of WAGO PFC200 versions 03.02.02(14), 03.01.07(13),…EPSS 2.5%9.1CVE-2016-9362Wago pfc200 firmware improper authentication vulnerabilityAn issue was discovered in WAGO 750-8202/PFC200 prior to FW04 (released August 2015), WAGO 750-881 prior to FW09 (released August 2016), and WAGO 075…EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2019-5184), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.