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Routers are network gateways whose flaws, misconfigurations, or exposed interfaces can enable unauthorized access, interception, or service disruption.

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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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U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a Cisco IOS flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a Cisco IOS flaw, tracked as CVE-2008-4128, to its Known Exploited Vulnerabilities (KEV) catalog. Cisco IOS 12.4 running on Cisco 871 Integrated Services Routers contains multiple CSRF flaws in […]

Security Affairs 14 Jul 2026, 6:05 a.m. Theme · 6 stories Actively exploited CVE-2008-4128 America Apple CISA Cisco CVE Flaw Routers Vulnerability

CERT/CC warns an unpatched backdoor in several Tenda routers lets attackers bypass login and gain full admin access with a hidden password. CERT/CC published an alert documenting an undocumented authentication backdoor in multiple Tenda firmware versions, tracked as CVE-2026-11405. The flaw gives anyone who knows the right password full administrative access to the device’s web […]

Security Affairs 7 Jul 2026, 9:45 p.m. Incident · 5 stories CVE-2026-11405 Authentication Backdoor Bypass CVE Firmware Flaw Patch Routers Warning
Security Affairs 1 month, 1 week ago

IoT Botnet C0XMO Adds Competitor-Killing Capability

C0XMO is a new Gafgyt botnet variant exploiting old router flaws, spreading across IoT devices, killing rivals, and enabling large-scale DDoS attacks. In March 2026, FortiGuard Labs discovered a new variant of the Gafgyt botnet, dubbed C0XMO, which is noticeably more capable than its predecessors. The malware spreads through CVE-2021-27137, a stack buffer overflow in […]

Security Affairs 8 Jun 2026, 7:03 p.m. Incident · 2 stories CVE-2021-27137 Botnet CVE DoS Flaw Fortinet IoT Malware Routers