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Arcadyan-Based Routers and Modems Vulnerable to Authentication Bypass

A path traversal vulnerability exists in numerous routers manufactured by multiple vendors using Arcadyan based software. This vulnerability allows an unauthenticated user access to sensitive information and allows for the alteration of the router configuration.

The vulnerability, identified as CVE-2021-20090, is a path traversal vulnerability. An unauthenticated attacker is able to leverage this vulnerability to access resources that would normally be protected. The researcher initially thought it was limited to one router manufacturer and published their findings, but then discovered that the issue existed in the Arcadyan based software that was being used in routers from multiple vendors.

Successful exploitation of this vulnerability could allow an attacker to access pages that would otherwise require authentication. An unauthenticated attacker could gain access to sensitive information, including valid request tokens, which could be used to make requests to alter router settings.

The CERT/CC recommends updating your router to the latest available firmware version. It is also recommended to disable the remote (WAN-side) administration services on any SoHo router and also disable the web interface on the WAN.

Read more at the Software Engineering Institute CERT Coordination Center

Homeland Security Todayhttp://www.hstoday.us
The Government Technology & Services Coalition's Homeland Security Today (HSToday) is the premier news and information resource for the homeland security community, dedicated to elevating the discussions and insights that can support a safe and secure nation. A non-profit magazine and media platform, HSToday provides readers with the whole story, placing facts and comments in context to inform debate and drive realistic solutions to some of the nation’s most vexing security challenges.

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