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Fencer Intel
high 7.5

CVE-2024-8419 json

Improper Access Control vulnerability in AC4xxS devices

published last yr. modified 4mo ago also EUVD-2024-54715

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

The endpoint hosts a script that allows an unauthorized remote attacker to put the system in a fail-safe state over the network due to missing authentication.

Patch / fix

  • ifm electronic GmbH ifm Smart PLC AC402s 4.3.17
  • ifm electronic GmbH ifm Smart PLC AC422s 4.3.17
  • ifm electronic GmbH ifm Smart PLC AC424s 4.3.17
  • ifm electronic GmbH ifm Smart PLC AC432s 4.3.17
  • ifm electronic GmbH ifm Smart PLC AC434s 4.3.17

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • ifm electronic GmbH ifm Smart PLC AC402s
  • ifm electronic GmbH ifm Smart PLC AC422s
  • ifm electronic GmbH ifm Smart PLC AC424s
  • ifm electronic GmbH ifm Smart PLC AC432s
  • ifm electronic GmbH ifm Smart PLC AC434s

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel 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.