CVE-2018-5459

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-13 · updated 2026-06-17
Weakness: CWE-287

Description

An Improper Authentication issue was discovered in WAGO PFC200 Series 3S CoDeSys Runtime versions 2.3.X and 2.4.X. An attacker can execute different unauthenticated remote operations because of the CoDeSys Runtime application, which is available via network by default on Port 2455. An attacker could execute some unauthenticated commands such as reading, writing, or deleting arbitrary files, or manipulate the PLC application during runtime by sending specially-crafted TCP packets to Port 2455.

Affected products

WAGO PFC200: before 02.07.07\(10\) — fixed in 02.07.07\(10\)

How to fix

Upgrade to a fixed version: WAGO PFC200 02.07.07\(10\). Check the vendor advisory for mitigations.

References

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