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CVE Record

CVE-2017-12092: An exploitable file write vulnerability exists in the memory module functionality of Allen Bradley Microlog...

An exploitable file write vulnerability exists in the memory module functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a file write resulting in a new program being written to the memory module. An attacker can send an unauthenticated packet to trigger this vulnerability.

LowCVSS 3.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects Allen-Bradley MicroLogix 1400 Series B controllers at FRN 21.2 and earlier. An unauthenticated network packet can cause a write to the memory module, potentially placing a new program there. The published CVSS score is low, but any unauthorized controller program write deserves operational attention.

Executive priority

Treat as a targeted operational integrity risk, not a broad internet emergency. Prioritize exposed or poorly segmented industrial sites first, then fold remaining affected controllers into normal firmware and compensating-control remediation.

Technical view

CVE-2017-12092 is a network-reachable file write flaw in the MicroLogix 1400 memory module function. The source states attack complexity is high, no privileges or user interaction are required, and the rated impact is limited integrity loss with no confidentiality or availability impact.

Likely exposure

Exposure is most relevant where affected MicroLogix 1400 Series B controllers are reachable over networks accessible to untrusted users or compromised hosts. The bundle names FRN 21.2 and earlier, including FRN 21.0 and FRN 15.

Exploitation context

The source states an unauthenticated specially crafted packet can trigger the condition. It does not state public exploitation, weaponized tooling, or CISA KEV listing. Because KEV is false in the bundle, active exploitation is not claimed here.

Researcher notes

The source bundle provides CVSS and affected version details but does not include a vendor fix version or mitigation text. Analysis should avoid assuming product families beyond MicroLogix 1400 Series B FRN 21.2 and earlier.

Mitigation direction

  • Inventory MicroLogix 1400 Series B controllers and record FRN versions.
  • Check Rockwell Automation or Allen-Bradley guidance for supported firmware or mitigations.
  • Restrict controller network access to trusted engineering and operations hosts.
  • Segment industrial control networks from corporate and internet-reachable networks.
  • Monitor for unexpected controller program or memory module changes.

Validation and detection

  • Confirm whether any MicroLogix 1400 Series B controller runs FRN 21.2 or earlier.
  • Review network paths that can reach affected controllers.
  • Check change records for authorized memory module or program updates.
  • Compare controller program state against approved engineering baselines.
  • Verify compensating controls limit unauthenticated access to controller services.
Prepared
Confidence
medium
Sources
3

Public sources used

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2017-12092 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.7 (3.0)
Known Exploited
No
Published

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

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

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
3.7CVSS 3.0LowCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N2.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

3.7Low
CVSS 3.0 vector shape for CVE-2017-12092Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
TalosAllen BradleyAllen Bradley Micrologix 1400 Series B FRN 21.2 Allen Bradley Micrologix 1400 Series B FRN 21.0 Allen Bradley Micrologix 1400 Series B FRN 15Listed
Weakness

CWE details

No CWE listed

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