Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware before 2.82 SEIL/X1 with firmware before 4.32 SEIL/X2 with firmware before 4.32 SEIL/B1 with firmware before 4.32 SEIL/Turbo with firmware before 2.16 and SEIL/neu 2FE Plus with firmware before 2.16 allows remote attackers to execute arbitrary code via a crafted L2TP message.