ThreatsTechnology, Cloud & SaaSCriticalDD-WRT Gateway Firmware Stack Buffer Overflow CVE-2021-27137 Weaponized in Network Perimeter AttacksCISA adds DD-WRT gateway vulnerability CVE-2021-27137 (CVSS 9.8) to KEV catalog following active weaponization by botnets targeting network perimeter routers.Aisha Noor·17 Sep 2026, 11:50 IST·13 min read