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CVE-2017-14471

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley…

Critical10.0EPSS 38.0%
Published
Updated
Reserved
Assigned by
talos

Description

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 Associated Fault Codes: 0023, 002e, and 0037 Fault Type: Recoverable Description: The STI, EII, and HSC function files contain bits signifying whether or not a fault has occurred. Additionally there is a bit signaling the module to auto start. When these bits are set for any of the three modules and the device is moved into a run state, a fault is triggered.

Scores

CVSS scores of CVE-2017-14471, by who scored it
Scored byCVSSScoreVector
talosCNA (assigner)3.0Critical10.0CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVDNVD · Modified3.0Critical9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
38.0% · top 1.4% of all CVEs (5 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.

Weakness

  • denial of service

Affected products

  • Talos · Allen Bradley

    • affected Allen Bradley Micrologix 1400 Series B FRN 21.2, Allen Bradley Micrologix 1400 Series B FRN 21.0, Allen Bradley Micrologix 1400 Series B FRN 15

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .