Unpatched Edimax Camera Flaw Exploited by Mirai Botnet for DDoS Attacks

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In a disturbing development, cybersecurity researchers have identified a severe vulnerability in the Edimax IC-7100 network camera that has been actively exploited since at least May 2024 to disseminate Mirai botnet variants. This flaw, officially known as CVE-2025-1316, carries a critical CVSS v4 score of 9.3 and enables remote code execution due to an operating system command injection flaw. Hackers have been leveraging this vulnerability through a specially crafted request targeting the /camera-cgi/admin/param.cgi endpoint. Shockingly, many devices are still using the default credentials (admin:1234), making unauthorized access remarkably straightforward for attackers.

Since June 2023, a proof-of-concept exploit for this vulnerability has been available to the public, which has undoubtedly facilitated its widespread abuse. Cybercriminals have taken advantage of this security lapse to grow their botnet networks, specifically aiming to orchestrate DDoS attacks over TCP and UDP protocols. These botnets not only utilize the Edimax camera flaw but also exploit other known vulnerabilities, including CVE-2024-7214 affecting TOTOLINK IoT devices, CVE-2021-36220, and even a Hadoop YARN vulnerability.

Lack of Security Patches

Edimax’s response to this alarming situation has been less than reassuring. In a recent advisory, the company acknowledged the existence of the flaw but declared that no security patch would be forthcoming. The affected devices were discontinued over a decade ago and no longer receive support, leaving users with limited options for securing their systems. Edimax has recommended that users either upgrade to newer models or adopt preventive measures to mitigate the risk. These measures include refraining from exposing the device directly to the internet, changing default administrative passwords, and diligently monitoring access logs for any unusual activity.

The persistence of this threat underscores a broader trend in cybersecurity: the exploitation of outdated and poorly secured devices. Despite the hardware’s age, the availability of public exploit information and lack of patches substantially contribute to these threats’ ongoing effectiveness. Cybercriminals are increasingly relying on obsolete firmware to build botnets efficiently, aided by freely accessible tutorials and source codes that simplify the exploitation process.

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