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CVE Record

CVE-2017-14468: An exploitable access control vulnerability exists in the data, program, and function file permissions func...

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: REMOTE or PROG Description: This ability is leveraged in a larger exploit to flash custom firmware.

CriticalCVSS 10Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2017-14468 affects Allen Bradley MicroLogix 1400 Series B controllers. An unauthenticated network packet can read or write protected controller files, risking sensitive data exposure, settings changes, ladder logic modification, and possible custom firmware flashing in a broader attack.

Executive priority

Treat this as urgent for exposed industrial environments. The impact includes unauthorized control logic changes and potential firmware tampering, but urgency depends on whether affected controllers are present and reachable.

Technical view

The flaw is an access control failure in data, program, and function file permissions for MicroLogix 1400 Series B FRN 21.2 and earlier. It is network-reachable, low complexity, requires no privileges or user interaction, and requires the keyswitch in REMOTE or PROG state.

Likely exposure

Exposure is limited to organizations operating the affected MicroLogix 1400 Series B firmware, especially where controller networks are reachable by untrusted hosts or remote access paths.

Exploitation context

The CVE record does not indicate CISA KEV listing or confirmed active exploitation. Talos describes unauthenticated packets causing read or write operations and notes the capability can support a larger custom-firmware attack.

Researcher notes

Evidence supports critical impact and unauthenticated network access, but the prompt bundle does not provide exploit details, official patch status, or confirmed exploitation. Avoid assuming broader product impact beyond listed MicroLogix 1400 Series B firmware.

Mitigation direction

  • Inventory MicroLogix 1400 Series B controllers and record FRN versions.
  • Prioritize FRN 21.2 and earlier for vendor-guidance review.
  • Check Allen Bradley or Talos guidance for supported firmware or compensating controls.
  • Limit untrusted network reachability to affected controllers under existing ICS access controls.
  • Review operational need for REMOTE or PROG keyswitch states.

Validation and detection

  • Confirm controller model, Series B status, and FRN version from asset records.
  • Verify whether affected controllers are reachable from non-ICS or remote-access networks.
  • Check current keyswitch operating state for affected devices.
  • Review change records for unexpected settings or ladder logic modifications.
  • Monitor for unusual unauthenticated controller file read or write activity where telemetry exists.
Prepared
Confidence
high
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-2017-14468 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
Critical
CVSS
10 (3.0)
Known Exploited
No
Published

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

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
10CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

10Critical
CVSS 3.0 vector shape for CVE-2017-14468Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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.