A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller, Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200, Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P, PROFINET Driver for Controller, RUGGEDCOM RM1224, SCALANCE M-800, SCALANCE S615, SCALANCE W700 IEEE 802.11n, SCALANCE X-200 switch family (incl. SIPLUS NET variants), SCALANCE X-200IRT (incl. SIPLUS NET variants), SCALANCE X-300 (incl. X408 and SIPLUS NET variants), SCALANCE XB-200, SCALANCE XC-200, SCALANCE XF-200BA, SCALANCE XM-400, SCALANCE XP-200, SCALANCE XR-300WG, SCALANCE XR-500, SIMATIC CP 1616 and CP 1604, SIMATIC CP 343-1 (incl. SIPLUS variants), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants), SIMATIC CP 343-1 ERPC, SIMATIC CP 343-1 Lean (incl. SIPLUS variants), SIMATIC CP 443-1 (incl. SIPLUS variants), SIMATIC CP 443-1 Advanced (incl. SIPLUS variants), SIMATIC CP 443-1 OPC UA, SIMATIC ET200AL IM 157-1 PN, SIMATIC ET200M IM153-4 PN IO HF (incl. SIPLUS variants), SIMATIC ET200M IM153-4 PN IO ST (incl. SIPLUS variants), SIMATIC ET200MP IM155-5 PN HF (incl. SIPLUS variants), SIMATIC ET200MP IM155-5 PN ST (incl. SIPLUS variants), SIMATIC ET200S (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN Basic (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN HF (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN ST (incl. SIPLUS variants), SIMATIC ET200ecoPN, 16DI, DC24V, 8xM12 (6ES7141-6BH00-0AB0), SIMATIC ET200ecoPN, 16DO DC24V/1,3A, 8xM12 (6ES7142-6BH00-0AB0), SIMATIC ET200ecoPN, 4AO U/I 4xM12 (6ES7145-6HD00-0AB0), SIMATIC ET200ecoPN, 8 DIO, DC24V/1,3A, 8xM12 (6ES7147-6BG00-0AB0), SIMATIC ET200ecoPN, 8 DO, DC24V/2A, 8xM12 (6ES7142-6BR00-0AB0), SIMATIC ET200ecoPN, 8AI RTD/TC 8xM12 (6ES7144-6KD50-0AB0), SIMATIC ET200ecoPN, 8AI; 4 U/I; 4 RTD/TC 8xM12 (6ES7144-6KD00-0AB0), SIMATIC ET200ecoPN, 8DI, DC24V, 4xM12 (6ES7141-6BF00-0AB0), SIMATIC ET200ecoPN, 8DI, DC24V, 8xM12 (6ES7141-6BG00-0AB0), SIMATIC ET200ecoPN, 8DO, DC24V/0,5A, 4xM12 (6ES7142-6BF50-0AB0), SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 4xM12 (6ES7142-6BF00-0AB0), SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 8xM12 (6ES7142-6BG00-0AB0), SIMATIC ET200ecoPN: IO-Link Master (6ES7148-6JA00-0AB0), SIMATIC ET200pro, IM 154-3 PN HF, SIMATIC ET200pro, IM 154-4 PN HF, SIMATIC IPC Support, Package for VxWorks, SIMATIC MV400, SIMATIC PN/PN Coupler 6ES7158-3AD01-0XA0 (incl. SIPLUS NET variant), SIMATIC RF180C, SIMATIC RF182C, SIMATIC RF600, SIMOTION C, SIMOTION D (incl. SIPLUS variants), SIMOTION P, SINAMICS DCP, SOFTNET-IE PNIO. Profinet-IO (PNIO) stack versions prior V06.00 do not properly limit internal resource allocation when multiple legitimate diagnostic package requests are sent to the DCE-RPC interface. This could lead to a denial of service condition due to lack of memory for devices that include a vulnerable version of the stack. The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device.