A vulnerability has been found in Linksys WRT1900ACS, EA7200, EA7450 and EA7500 up to 20250619 and classified as critical. This vulnerability affects the function SetDefaultConnectionService of the file /upnp/control/Layer3Forwarding of the component IGD. The manipulation of the argument NewDefaultConnectionService leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.