CVE-2019-5079
CVE-2019-5079 is a critical-severity vulnerability in Wago Pfc 200 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 3% (87th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Wago Pfc 200 Firmware
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2019-5079?
- 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.
- How severe is CVE-2019-5079?
- CVE-2019-5079 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-5079 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-5079?
- CVE-2019-5079 primarily affects Wago Pfc 200 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-5079?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-5079 published?
- CVE-2019-5079 was published on 2019-12-18 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:o:wago:pfc_200_firmware:03.00.39\(12\):*:*:*:*:*:*:*
- cpe:2.3:o:wago:pfc_200_firmware:03.01.07\(13\):*:*:*:*:*:*:*
- cpe:2.3:o:wago:pfc_100_firmware:03.00.39\(12\):*:*:*:*:*:*:*
More vulnerabilities in Wago Pfc 200 Firmware
- CVE-2020-12522 — Critical (CVSS 10.0): The reported vulnerability allows an attacker who has network access to the device to execute code with specially…
- CVE-2019-5075 — Critical (CVSS 9.8): An exploitable stack buffer overflow vulnerability exists in the command line utility getcouplerdetails of WAGO PFC200…
- CVE-2019-5081 — Critical (CVSS 9.8): An exploitable heap buffer overflow vulnerability exists in the iocheckd service ''I/O-Chec'' functionality of WAGO PFC…
- CVE-2019-5074 — Critical (CVSS 9.8): An exploitable stack buffer overflow vulnerability exists in the iocheckd service ''I/O-Check'' functionality of WAGO…
- CVE-2019-5080 — Critical (CVSS 9.1): An exploitable denial-of-service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200…
- CVE-2019-5078 — Critical (CVSS 9.1): An exploitable denial of service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC200…
All CVEs affecting Wago Pfc 200 Firmware →
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