CVE intelligence and bounded remediation

CVE-2016-5645 — Rockwellautomation 1766-L32Awa security vulnerability

High CVSS 7.5

Rockwell Automation MicroLogix 1400 PLC 1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA, 1766-L32AWAA, and 1766-L32BXBA devices have a hardcoded SNMP community, which makes it easier for remote attackers to load arbitrary firmware updates by leveraging knowledge of this community.

Severity
High
CVSS
7.5 (2.0)
Published
2016-08-24
CISA KEV
Not currently listed
Ecosystem
hardware/firmware
Weaknesses
CWE-284, CWE-798

Affected products

  • rockwellautomation / 1766-l32awa
  • rockwellautomation / 1766-l32awaa
  • rockwellautomation / 1766-l32bwa
  • rockwellautomation / 1766-l32bwaa
  • rockwellautomation / 1766-l32bxb
  • rockwellautomation / 1766-l32bxba

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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