SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-700312740] WAGO Ethernet Web-based Management Authentication Bypass Vulnerability

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2016-12-22OtherWAGOMaxim RuppN/ACVE-2016-9362 N/AN/AN/A


# WAGO Ethernet Web-based Management Authentication Bypass Vulnerability


Independent researcher Maxim Rupp has identified an authentication bypass vulnerability in WAGO’s Ethernet Web-based Management products. WAGO has produced firmware and workarounds to mitigate this vulnerability.
This vulnerability could be exploited remotely.


WAGO reports that the vulnerability affects the following products:
WAGO 750-8202/PFC200 prior to FW04 (released August 2015),
WAGO 750-881 prior to FW09 (released August 2016), and
WAGO 0758-0874-0000-0111


An attacker who exploits this vulnerability could be able to view and edit settings without authenticating.
Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.


WAGO is an international company based in Germany. They operate production facilities in Germany, Switzerland, Poland, China, and India. WAGO maintains offices worldwide.
According to WAGO, its products are deployed across several sectors including Commercial Facilities, Critical Manufacturing, Energy, and Transportation Systems. WAGO estimates that these products are used worldwide.



By accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to edit and to view settings without authenticating.
CVE-2016-9362b has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)



This vulnerability could be exploited remotely.


No known public exploits specifically target this vulnerability.


An attacker with a low skill would be able to exploit this vulnerability.


WAGO recommends the following use conditions for Ethernet devices:
If not otherwise specified, Ethernet devices are intended for use on local networks
Users should note the following when using Ethernet devices:
Do not connect control components and control networks to an open network such as the Internet or an office network
WAGO recommends putting control components and control networks behind a firewall.
Limit physical and electronic access to all automation components to authorized personnel only.
Change the default passwords before first use
This will reduce the risk of unauthorized access to systems.
Regularly change passwords
This will reduce the risk of unauthorized access to systems.
If remote access to control components and control networks is required, use a Virtual Private Network (VPN).
Regularly perform threat analyses
Check whether the measures taken meet company security requirements.
Use “defense-in-depth” mechanisms in the system’s security configuration to restrict the access to and control of individual products and networks.