Rockwell MicroLogix Cleartext Transmission of Sensitive Information (CVE-2016-9334)

high Tenable OT Security Plugin ID 500181


The remote OT asset is affected by a vulnerability.


An issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 controller 1763-L16AWA, Series A and B, Version 14.000 and prior versions; 1763-L16BBB, Series A and B, Version 14.000 and prior versions; 1763-L16BWA, Series A and B, Version 14.000 and prior versions; and 1763-L16DWD, Series A and B, Version 14.000 and prior versions. User credentials are sent to the web server in clear text, which may allow an attacker to discover the credentials if they are able to observe traffic between the web browser and the server.

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: High

ID: 500181

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 11/30/2023

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Low

Score: 3.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2016-9334


Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:rockwellautomation:1766-l32awaa_series_a, cpe:/a:rockwellautomation:1766-l32awaa_series_b, cpe:/a:rockwellautomation:1766-l32bxba_series_a, cpe:/a:rockwellautomation:1763-l16bbb_series_a, cpe:/a:rockwellautomation:1763-l16dwd_series_b, cpe:/a:rockwellautomation:1763-l16dwd_series_a, cpe:/a:rockwellautomation:1763-l16bwa_series_b, cpe:/a:rockwellautomation:1766-l32bxb_series_a, cpe:/a:rockwellautomation:1766-l32bwaa_series_a, cpe:/a:rockwellautomation:1766-l32awa_series_b, cpe:/a:rockwellautomation:1763-l16awa_series_a, cpe:/a:rockwellautomation:1766-l32bwaa_series_b, cpe:/a:rockwellautomation:1766-l32bwa_series_a, cpe:/a:rockwellautomation:1766-l32bwa_series_b, cpe:/a:rockwellautomation:1766-l32awa_series_a, cpe:/a:rockwellautomation:1766-l32bxba_series_b, cpe:/a:rockwellautomation:1766-l32bxb_series_b, cpe:/a:rockwellautomation:1763-l16awa_series_b, cpe:/a:rockwellautomation:1763-l16bbb_series_b, cpe:/a:rockwellautomation:1763-l16bwa_series_a

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 2/13/2017

Vulnerability Publication Date: 2/13/2017

Reference Information

CVE: CVE-2016-9334