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Critical severity9.1NVD Advisory· Published Dec 18, 2019· Updated Jun 17, 2026

CVE-2019-5077

CVE-2019-5077

Description

An exploitable denial-of-service vulnerability exists in the iocheckd service ‘’I/O-Chec’’ functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC 100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a denial of service, resulting in the device entering an error state where it ceases all network communications. An attacker can send unauthenticated packets to trigger this vulnerability.

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Affected products

5
  • Wago/Pfc100 Firmware2 versions
    cpe:2.3:o:wago:pfc_100_firmware:03.00.39\(12\):*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:wago:pfc_100_firmware:03.00.39\(12\):*:*:*:*:*:*:*
    • (no CPE)range: 03.00.39(12)
  • Wago/Pfc200 Firmware3 versions
    cpe:2.3:o:wago:pfc_200_firmware:03.00.39\(12\):*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:wago:pfc_200_firmware:03.00.39\(12\):*:*:*:*:*:*:*
    • cpe:2.3:o:wago:pfc_200_firmware:03.01.07\(13\):*:*:*:*:*:*:*
    • (no CPE)range: 03.01.07(13), 03.00.39(12)

Patches

Vulnerability mechanics

References

1

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