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No exploitation reported

CVE-2019-5075

No exploitation reported by the sources we read.

  • Published2019-12-18
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An exploitable stack buffer overflow vulnerability exists in the command line utility getcouplerdetails 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 sent to the iocheckd service "I/O-Check" can cause a stack buffer overflow in the sub-process getcouplerdetails, resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.

Timeline

dates in UTC
  1. 2019-12-1821:15CVE publishedNVD

Versions per branch

NVD
Wago pfc 200 firmwareversion to verify
BranchAffectedFixed in
3.0= 03.00.39\(12\)no fix published
3.1= 03.01.07\(13\)no fix published
Wago pfc 100 firmwareversion to verify
BranchAffectedFixed in
3.0= 03.00.39\(12\)no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-20-065-01 CISA4 known affected

    WAGO I/O-CHECK

    Series PFC200: (750-82xx/xxx-xxx) · I/O-CHECK Series PFC100 and Series PFC200: 750-823 750-832/xxx-xxx 750-862 750-890/xxx-xxx 750-891 · Series PFC100: (750-81xx/xxx-xxx) · +1 more

Full record on NVD

Fix

  1. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsWAGO recommends updating to the latest firmware, FW 15 or above. WAGO has identified the following specific workarounds and mitigations users can apply to reduce the risk:
  2. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsThe I/O-Check service protocol is only needed during installation and commissioning, not during normal operations.
  3. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsIt is highly recommended to disable IP Port 6626 after commissioning.
  4. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsDisable unused TCP/UDP-ports.
  5. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsRestrict network access to the device.
  6. Mitigation from the vendor CISA ICSA-20-065-01 · 4 productsDo not directly connect the device to the Internet.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-12-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8c7x-5xg2-cr7x

Frequently asked questions

What is CVE-2019-5075?

An exploitable stack buffer overflow vulnerability exists in the command line utility getcouplerdetails 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 sent to the iocheckd service "I/O-Check" can cause a stack buffer overflow in the sub-process getcouplerdetails, resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.

Is CVE-2019-5075 actively exploited?

Active exploitation of CVE-2019-5075 has not been confirmed. Its EPSS score was 3.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-5075?

CVE-2019-5075 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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