Rockwell Automation ISaGRAF5 Runtime Cleartext Transmission of Sensitive Information (CVE-2020-25178)

high Tenable OT Security Plugin ID 500640


The remote OT asset is affected by a vulnerability.


ISaGRAF Workbench communicates with Rockwell Automation ISaGRAF Runtime Versions 4.x and 5.x using TCP/IP. This communication protocol provides various file system operations, as well as the uploading of applications. Data is transferred over this protocol unencrypted, which could allow a remote unauthenticated attacker to upload, read, and delete files.

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The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at

Rockwell Automation recommends users update to ISaGRAF Runtime 5 Version 5.72.00. End users are encouraged to restrict or block access on TCP 1131 and TCP 1132 from outside the industrial control system. Confirm the least-privilege user principle is followed and user/service account access to Runtime's folder location is granted with a minimum amount of rights needed.

Rockwell Automation recommends users of affected versions evaluate the mitigations provided and apply the appropriate mitigations to deployed products. Users are encouraged to combine this guidance with the general security guidelines for a comprehensive defense-in-depth strategy.

To reduce risk, Rockwell Automation recommends users:

- Employ proper network segmentation and security controls.
- Minimize network exposure for all control system devices.
- Locate control systems behind firewalls.
- Isolate control systems from other networks when possible.
- Refer to the Converged Plantwide Ethernet (CPwE) Design and Implementation Guide for best practices deploying network segmentation and broader defense-in-depth strategies.
- Consider using proper network infrastructure controls, such as firewalls, UTM devices, VPN, or other security appliances.
- Ensure the least-privilege user principle is followed, and user/service account access to Runtime’s folder location is granted with a minimum amount of rights, as needed.

Please see publications from Rockwell Automation and Schneider Electric, Xylem, or contact GE for further information about how to mitigate these vulnerabilities in additional affected products.

See Also

Plugin Details

Severity: High

ID: 500640

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 4/28/2022

Updated: 11/30/2023

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2020-25178


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/o:rockwellautomation:micro810_firmware:-, cpe:/o:rockwellautomation:micro820_firmware:-, cpe:/o:rockwellautomation:micro830_firmware:-, cpe:/o:rockwellautomation:micro850_firmware:-, cpe:/o:rockwellautomation:micro870_firmware:-

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2022

Vulnerability Publication Date: 3/18/2022

Reference Information

CVE: CVE-2020-25178

CWE: 319