PT-2014-26: Authentication Bypass in Cisco TelePresence VCS, Cisco Expressway, and Cisco TelePresence Conductor

Vulnerable products

Cisco TelePresence VCS and Cisco Expressway
Version: X8.5 and earlier

Cisco TelePresence Conductor
Version: XC3.0.1 and earlier


Severity level

Severity level: High
Impact: Authentication bypass
Access Vector: Remote

CVSS v2:
Base Score: 10
Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVE: CVE-2015-0653

Products description

Cisco TelePresence VCS, Cisco Expressway, and Cisco TelePresence Conductor - Cisco's video collaboration hardware and virtual appliances used for business.

Vulnerability description

The specialists of the Positive Research center have detected an Authentication Bypass vulnerability in Cisco TelePresence VCS, Cisco Expressway, and Cisco TelePresence Conductor.

The usage of not type-aware comparison of strings allows to bypass verification of password hash and IP address.

How to fix

Update your software up to the latest version

Advisory status

25.09.2014 - Vendor gets vulnerability details
11.03.2015 - Vendor releases fixed version and details
28.09.2016 - Public disclosure


The vulnerability was detected by Andrey Medov, 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+