CVE-2009-3739

CRITICAL

Multiple unspecified vulnerabilities on the Rockwell Automation AB Micrologix 1100 and 1400 controllers allow remote attackers to obtain privileged access or cause a denial of service (halt) via un...

Affects 2 products across 1 vendor.

BCS6.95
CVSS 2.010.0
EPSS4.3%
Percentile90th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ SAGE Intelligence — CITED Relevance Research Team

Multiple unspecified vulnerabilities in Rockwell Automation AB Micrologix 1100 and 1400 controllers allow remote attackers to gain privileged access or cause a denial of service.

BSID: BS-2010-GLOBAL-324955-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2009-3739?
Multiple unspecified vulnerabilities in Rockwell Automation AB Micrologix 1100 and 1400 controllers allow remote attackers to gain privileged access or cause a denial of service.
What is the CVSS score for CVE-2009-3739?
CVE-2009-3739 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 4.3%.
Is CVE-2009-3739 actively exploited?
No confirmed active exploitation of CVE-2009-3739 as of 2026-05-30.
How do I remediate CVE-2009-3739?
Priority: IMMEDIATE.
What systems are affected by CVE-2009-3739?
CVE-2009-3739 affects: Rockwell Automation, Rockwell Automation.
Vulnerability Details
CVE IDCVE-2009-3739
BSIDBS-2010-GLOBAL-324955-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2010-01-19
Last Modified2026-04-23
ICS Relevance85%
Verticals
ICS-OT
SourceNVD
Official Description

Multiple unspecified vulnerabilities on the Rockwell Automation AB Micrologix 1100 and 1400 controllers allow remote attackers to obtain privileged access or cause a denial of service (halt) via unknown vectors.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The attack vector is unspecified, but it involves remote access to the controllers, potentially through network interfaces.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductFixed Version
Rockwell Automation Ab Micrologix Controller 1100
Rockwell Automation Ab Micrologix Controller 1400
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: August 2026 | Threat Age: 6041 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
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