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Fencer Vulns
high 8.7

CVE-2026-9637 json

CompactLogix® 5380 / ControlLogix® 5580 - Multiple Vulnerabilities

published 2026-09-01 2 mo ago modified 2026-09-01 2 mo ago also EUVD-2026-69133

cvss
8.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover

Vendor advisories

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

cisa ICSA-26-244-03 updated cvss 7.5

Rockwell Automation Logix Platform

  • Rockwell Automation Compact GuardLogix 5380 <=V33, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012 Rockwell Automation CompactLogix 5380 <=V33, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012 Rockwell Automation ControlLogix 5580 <=V33, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012 Rockwell Automation GuardLogix 5580 <=V33, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012
    affected: vendor fix, mitigation “Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.”

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 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Rockwell Automation CompactLogix® 5380 / ControlLogix® 5580

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.