PT-2016-13: Information Disclosure in Siemens SIMATIC STEP 7 (TIA Portal)

Vulnerable software

Siemens SIMATIC STEP 7 (TIA Portal)
Version: 13 and earlier


Severity level

Severity level: Low
Impact: Information Disclosure
Access Vector: Local

CVSS v2:
Base Score: 1.9
Vector: (AV:L/AC:M/Au:N/C:P/I:N/A:N)

CVE: CVE-2016-7959

Software description

Siemens SIMATIC STEP 7 (TIA Portal) is an engineering software to configure and program SIMATIC controllers and Standard PCs running WinAC RTX.

Vulnerability description

The specialists of the Positive Research center have detected an Information Disclosure vulnerability in Siemens SIMATIC STEP 7 (TIA Portal).

The vulnerability improperly stores pre-shared key data in TIA project files, which makes it easier for local users to obtain sensitive information.

How to fix

Update your software up to the latest version

Advisory status

15.01.2015 - Vendor gets vulnerability details
12.10.2016 - Vendor releases fixed version and details
03.11.2016 - Public disclosure


The vulnerability was detected by Dmitry Sklyarov, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research:

About Positive Technologies

Positive Technologies is a leading provider of vulnerability assessment, compliance management and threat analysis solutions to more than 1,000 global enterprise clients. Our solutions work seamlessly across your entire business: securing applications in development; assessing your network and application vulnerabilities; assuring compliance with regulatory requirements; and blocking real-time attacks. Our commitment to clients and research has earned Positive Technologies a reputation as one of the foremost authorities on SCADA, Banking, Telecom, Web Application and ERP security, and distinction as the #1 fastest growing Security and Vulnerability Management firm in 2012, as shown in an IDC report*. To learn more about Positive Technologies please visit

*Source: IDC Worldwide Security and Vulnerability Management 2013-2017 Forecast and 2012 Vendor Shares, doc #242465, August 2013. Based on year-over-year revenue growth in 2012 for vendors with revenues of $20M+