CVE-2017-16740

10.0 CRITICAL 7% exploit odds Fix listed Memory safety Device

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 7.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2018-01-09 21:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 01:09 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 7.2% in the next 30 days (EPSS).
Severity: 10.0 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2018-01-09 21:29 UTC
Last modified: 2026-06-17 01:09 UTC
Exploit probability: 7.2% · EPSS, next 30 days
Weakness: CWE-120 · Classic buffer overflow
Record status: Modified

Affected

Rockwellautomation 1766-l32bxba Firmware ≤ 21.002
Rockwellautomation 1766-l32awa Firmware ≤ 21.002
Rockwellautomation 1766-l32bxb Firmware ≤ 21.002
Rockwellautomation 1766-l32bwaa Firmware ≤ 21.002
Rockwellautomation 1766-l32awaa Firmware ≤ 21.002
Rockwellautomation 1766-l32bwa Firmware ≤ 21.002

Attack profile CVSS 3.0 · 10.0

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record