Routers & Modems Running Arcadyan Firmware Are Presently Under Attack

This isn’t good to say the least.

Routers and modems running a version of the Arcadyan firmware, including devices from ASUS, Orange, Vodafone, and Verizon, are currently under attack from a threat actor attempting to ensnare the devices into their DDoS botnet:

First spotted by security firm Bad Packets earlier this week and confirmed by Juniper Labs on Friday, the attacks are exploiting a vulnerability tracked as CVE-2021-20090.

Discovered by Tenable security researcher Evan Grant earlier this year, the vulnerability resides in the firmware code produced by Taiwanese tech firm Arcadyan. Grant says the vulnerability has existed in the code for at least ten years and has made its way into the firmware of at least 20 router and modem models sold by 17 different vendors, which based their products on a white-label version of old Arcadyan devices. The list of affected devices includes some of today’s biggest router vendors and internet service providers, such as ASUS, Orange, Vodafone, Telstra, Verizon, Deutsche Telekom, British Telecom, and many others.

Hopefully the hardware vendors are preparing firmware updates to stop this attack. Or if they aren’t, affected users should be swapping out the hardware for more secure hardware. Either way, this as I said earlier is not a good situation.

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