D-Link has issued a warning regarding three critical vulnerabilities that allow remote command execution, which affect the DIR-878 routers across all models, despite the fact that this device has reached its end of service. The router, which remains available in various markets, was highly regarded for its dual-band performance when it was released back in 2017.

Researcher Yangyifan has publicly shared technical details and proof-of-concept (PoC) exploit code for these vulnerabilities.

While the DIR-878 can still be found at prices ranging from $75 to $122, D-Link emphasizes that since it reached its end-of-life status in 2021, users will not receive any security updates for this router. The company strongly recommends transitioning to a currently supported device.

The D-Link security advisory identifies a total of four vulnerabilities, with only one necessitating physical access to exploit:

• CVE-2025-60672: Unauthenticated remote command execution through setdynamicdnssettings parameters that are stored in nvram and utilized in system commands.
• CVE-2025-60673: Unauthenticated remote command execution via setdmzsettings where an unsanitized ipaddress value is injected into iptables commands.
• CVE-2025-60674: A stack overflow vulnerability in USB storage management triggered by an oversized "serial number" field (requires physical access or USB device control).
• CVE-2025-60676: Arbitrary command execution stemming from unsanitized fields in /tmp/new_qos.rule, which are processed by binaries using the system() call.

Even though the vulnerabilities can be exploited remotely and the exploit code is accessible, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) has categorized these issues with a medium severity rating.

Nonetheless, publicly available exploits can certainly attract the attention of malicious actors, especially those operating botnets who often integrate these weaknesses into their targeting strategies. For example, the large botnet named Rondodox has exploited over 56 vulnerabilities, including some in D-Link devices.

In a more recent incident, BleepingComputer reported that the Aisuru botnet executed a significant distributed denial-of-service (DDoS) attack on Microsoft's Azure network, generating a massive traffic volume of 15.72 terabits per second from over 500,000 IP addresses.

A recent exploit chain has demonstrated the linking of four zero-day vulnerabilities,

effectively bypassing both renderer and operating system sandbox defenses.

This development signals an impending surge in new exploit techniques.

Attend the Autonomous Validation Summit on May 12th and 14th to explore methods for autonomous, context-rich security validation.

Learn how to identify exploitable weaknesses, verify the effectiveness of security controls,

and complete the remediation cycle efficiently.

Secure your attendance now.

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