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CVE Record

CVE-2012-6440: Rockwell Automation ControlLogix PLC Improper Input Validation

The Web server password authentication mechanism used by the products is vulnerable to a MitM and Replay attack. Successful exploitation of this vulnerability will allow unauthorized access of the product’s Web server to view and alter product configuration and diagnostics information. Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

CriticalCVSS 9.3Not KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This vulnerability affects Rockwell Automation industrial control products with vulnerable web server password authentication. An attacker who can intercept and replay authentication traffic could gain unauthorized access to the device web server and change configuration or diagnostics information. The business risk is high because affected systems may support production or safety-adjacent operations. Exposure is most likely in OT environments running listed Rockwell modules or controllers with their web server reachable from untrusted, shared, or poorly segmented networks. Treat this as urgent for any exposed or production-critical Rockwell environment. Prioritize asset discovery, network restriction, and vendor guidance review before routine maintenance windows. Mitigation focus: Identify affected Rockwell products and firmware generations in asset inventory.; Review Rockwell and CISA advisories for product-specific updates or mitigations.; Restrict web server access to trusted engineering workstations and management networks..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · medium confidence lookup

CWE-287: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2012-6440 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.3 (2.0)
Known Exploited
No
Published

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.3CVSS 2.0CriticalAV:N/AC:M/Au:N/C:C/I:C/A:C8.610icscert
4.8CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N2.22.5CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

4.8Medium
CVSS 3.1 vector shape for CVE-2012-6440Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Rockwell Automation1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modulesAllunaffected
Rockwell AutomationCompactLogix L32E and L35E controllersAllunaffected
Rockwell Automation1788-ENBT FLEXLogix adapterAllunaffected
Rockwell Automation1794-AENTR FLEX I/O EtherNet/IP adapterAllunaffected
Rockwell AutomationControlLogix, CompactLogix, GuardLogix, and SoftLogix0unaffected
Rockwell AutomationCompactLogix and SoftLogix controllers0unaffected
Rockwell AutomationControlLogix and GuardLogix controllers0unaffected
Rockwell AutomationMicroLogix1100, 1400unaffected
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-287 · source CWE mapping

Improper Authentication

Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.