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Fencer Vulns
high 8.6

CVE-2024-3493 json

Rockwell Automation ControlLogix and GaurdLogix Vulnerable to Major Nonrecoverable Fault Due to Invalid Header Value

published 2024-04-15 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-32079

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A specific malformed fragmented packet type (fragmented packets may be generated automatically by devices that send large amounts of data) can cause a major nonrecoverable fault (MNRF) Rockwell Automation's ControlLogix 5580, Guard Logix 5580, CompactLogix 5380, and 1756-EN4TR. If exploited, the affected product will become unavailable and require a manual restart to recover it. Additionally, an MNRF could result in a loss of view and/or control of connected devices.

Vendor advisories

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

cisa ICSA-24-107-03 updated cvss 8.6

Rockwell Automation ControlLogix and GuardLogix (Update A)

  • Rockwell Automation 1756-EN4TR V5.001
    affected: fixed in V6.001, mitigation “Rockwell Automation has released product updates addressing this vulnerability:” idp.rockwellautomation.com
  • Rockwell Automation Compact GuardLogix 5380 V35.011 Rockwell Automation CompactLogix 5380 V35.011 Rockwell Automation CompactLogix 5380 Process V35.011 Rockwell Automation CompactLogix 5480 V35.011 Rockwell Automation ControlLogix 5580 V35.011 Rockwell Automation ControlLogix 5580 Process V35.011
    +1 more products
    Rockwell Automation GuardLogix 5580 V35.011
    affected: fixed in V35.013, mitigation “Rockwell Automation has released product updates addressing this vulnerability:” idp.rockwellautomation.com

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 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

  • Rockwell Automation ControlLogix 5580
  • Rockwell Automation GuardLogix 5580
  • Rockwell Automation CompactLogix 5380
  • Rockwell Automation 1756-EN4TR
  • rockwellautomation guardlogix_5580_firmware
  • rockwellautomation compactlogix_5380_firmware
  • rockwellautomation 1756-en4tr_firmware

Classification

Weakness
  • CWE-20 Improper Input Validation

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.