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Fencer Intel
critical 10.0

CVE-2017-16740 json

A Buffer Overflow issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers, Series B and C Versions 21.002 and…

published 2018-01-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-7924

cvss
10.0
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.2%
EPSS 7.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

A Buffer Overflow issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers, Series B and C Versions 21.002 and earlier. The stack-based buffer overflow vulnerability has been identified, which may allow remote code execution.

Vendor advisories

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

cisa ICSA-18-009-01 updated cvss 8.6

Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers

  • Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers 1766-L32AWAA, 1766-L32AWA, 1766-L32BWAA, 1766-L32BXBA Rockwell Automation MicroLogix 1400 Controllers Series B and C <= 21.002
    affected: mitigation “Rockwell Automation encourages affected users to upgrade to the latest version of available firmware, FRN 21.003” compatibility.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

Exploit prediction

7.20% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 10.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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 Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.