Routers are network gateways whose flaws, misconfigurations, or exposed interfaces can enable unauthorized access, interception, or service disruption.
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Background for this topic.
Routers are network devices that forward packets between separate networks, using destination addresses to choose a path. A home router usually connects a local network to the internet and may also provide wireless access, address assignment, network address translation, firewall rules, VPN termination, or DNS forwarding. Enterprise routers can connect internal segments, data centers, and remote sites.
In security, a router is both a traffic-control point and an attack surface. Vulnerable firmware, exposed administrative services, weak credentials, or unnecessary remote management can let an attacker alter routing, redirect traffic, or use the device to reach other systems; misconfigured rules can expose internal services. Reduce risk by keeping firmware supported and updated, restricting management to trusted networks, using strong unique authentication, disabling unneeded services, separating networks, and reviewing logs and configurations. During an incident, router configuration and routing or DNS changes can provide useful evidence, while tested backups help restore trusted connectivity.
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Devices from Cisco, Netgear and others at risk from the multi-stage malware, which has been active since April 2020 and shows the work of a sophisticated threat actor.
A flaw in all versions of the popular C standard libraries uClibe and uClibe-ng can allow for DNS poisoning attacks against target devices.
The Russian-speaking APT behind the NotPetya attacks and the Ukrainian power grid takedown could be setting up for additional sinister attacks, researchers said.
The company's RV line of small-business routers contains 15 different security vulnerabilities that could enable everything from RCE to corporate network access and denial-of-service – and many have exploits circulating.