ABB RTU500 Exposure of Sensitive Information to an Unauthorized Actor (CVE-2026-1772)

medium Tenable OT Security Plugin ID 505206

Synopsis

The remote OT asset is affected by a vulnerability.

Description

RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface but requires further tools like browser development utilities to access them without required privileges.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Medium

ID: 505206

File Name: tenable_ot_abb_CVE-2026-1772.nasl

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/4/2026

Updated: 3/4/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v3

Risk Factor: Medium

Base Score: 5.3

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

Vulnerability Information

CPE: cpe:/o:hitachienergy:rtu540_firmware:13.8.1, cpe:/o:hitachienergy:rtu560_firmware:12, cpe:/o:hitachienergy:rtu530_firmware:13.8.1, cpe:/o:hitachienergy:rtu520_firmware:13.8.1, cpe:/o:hitachienergy:rtu540_firmware:12, cpe:/o:hitachienergy:rtu520_firmware:12, cpe:/o:hitachienergy:rtu520_firmware:13, cpe:/o:hitachienergy:rtu540_firmware:13, cpe:/o:hitachienergy:rtu560_firmware:13, cpe:/o:hitachienergy:rtu530_firmware:12, cpe:/o:hitachienergy:rtu560_firmware:13.8.1, cpe:/o:hitachienergy:rtu530_firmware:13

Required KB Items: Tenable.ot/ABB

Patch Publication Date: 2/24/2026

Vulnerability Publication Date: 2/24/2026

Reference Information

CVE: CVE-2026-1772

CWE: 280

Detections

Analytics