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Fencer Vulns
critical 9.8

CVE-2018-5459 json

An Improper Authentication issue was discovered in WAGO PFC200 Series 3S CoDeSys Runtime versions 2.3.X and 2.4.X.

published 2018-02-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17229

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • wago pfc200_firmware 02.07.07\(10\)

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-044-01 updated cvss 9.8

WAGO PFC200 Series

  • WAGO 750-8202 < 02.07.07(10) WAGO 750-8202/025-000 < 02.07.07(10) WAGO 750-8202/025-001 < 02.07.07(10) WAGO 750-8202/025-002 < 02.07.07(10) WAGO 750-8202/040-001 < 02.07.07(10) WAGO 750-8203 < 02.07.07(10)
    +12 more products
    WAGO 750-8203/025-000 < 02.07.07(10) WAGO 750-8204 < 02.07.07(10) WAGO 750-8204/025-000 < 02.07.07(10) WAGO 750-8206 < 02.07.07(10) WAGO 750-8206/025-000 < 02.07.07(10) WAGO 750-8206/025-001 < 02.07.07(10) WAGO 750-8207 < 02.07.07(10) WAGO 750-8207/025-000 < 02.07.07(10) WAGO 750-8207/025-001 < 02.07.07(10) WAGO 750-8208 < 02.07.07(10) WAGO 750-8208/025-000 < 02.07.07(10) WAGO CoDeSys 2.4.X, 2.3.X
    affected: vendor fix

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.68% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a WAGO PFC200 Series

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.