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TI-2019-03622 Aliases CVE-2019-5166GHSA-w4qg-v526-9gvf

Out-of-bounds write in WAGO PFC200 Firmware

Priority LOW 36CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.

Why it matters now

EPSS 0.00818 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
WAGOWAGO PFC200 Firmwareversion 03.02.02(14)—No fix listedCNA
  • WAGO PFC200 Firmware VendorWAGO Affected version 03.02.02(14) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:wago:pfc200_firmware:03.02.02\(14\):*:*:*:*:*:*:*03.02.02(14)VulnerableWAGO
cpe:2.3:h:wago:pfc200:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
  • cpe:2.3:o:wago:pfc200_firmware:03.02.02\(14\):*:*:*:*:*:*:* Versions 03.02.02(14) Vulnerable ·WAGO
  • cpe:2.3:h:wago:pfc200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-5166
  2. 2026-10-03 Alias added: GHSA-w4qg-v526-9gvf

References

Exploit 1

  • TI-2023-01594 WAGO: WBM Command Injection in multiple products CVSS 3.1CRITICAL 9.8
  • TI-2019-03543 Out-of-bounds write in WAGO PFC200 CVSS 3.1CRITICAL 9.8
  • TI-2018-03970 Improper authentication in WAGO PFC200 Series CVSS 3.0CRITICAL 9.8
  • TI-2022-22215 WAGO: Missing Authentication for Critical Function CVSS 3.1CRITICAL 9.8
  • TI-2019-03617 Insufficient verification of data authenticity in WAGO PFC200 Firmware CVSS 3.1CRITICAL 9.1
  • TI-2019-03616 An exploitable improper host validation vulnerability exists in the Cloud Connectivity… CVSS 3.1CRITICAL 9.1
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences