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CVE-2019-5079
CRITICAL
An exploitable heap buffer overflow vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a heap buffer overflow, potentially resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.
Published: Dec 18, 2019
Modified: Jun 17, 2026
CWE-787
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (3)
| Vendor | Product | Version |
|---|---|---|
| wago | pfc_200_firmware | 03.00.39\(12\) |
| wago | pfc_200_firmware | 03.01.07\(13\) |
| wago | pfc_100_firmware | 03.00.39\(12\) |
GitHub Security Advisory GHSA-69j7-ff29-gmc8
An exploitable heap buffer overflow vulnerability exists in the iocheckd service "I/O-Check"...
References (2)
- https://talosintelligence.com/vulnerability_reports/TALOS-2019-0871 Exploit, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2019-0871 Exploit, Third Party Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
3.32%
Top 12% most likely to be exploited
Threat Score
40.2 / 100
Data Sources
NVD
EPSS
GitHub