A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P (All versions), SIMATIC CFU PA (All versions < V1.2.0), SIMATIC ET 200AL (All versions), SIMATIC ET 200M (All versions), SIMATIC ET 200MP IM 155-5 PN BA (All versions < V4.2.3), SIMATIC ET 200MP IM 155-5 PN HF (All versions), SIMATIC ET 200MP IM 155-5 PN ST (All versions), SIMATIC ET 200S (All versions), SIMATIC ET 200SP IM 155-6 PN BA (All versions), SIMATIC ET 200SP IM 155-6 PN HA (All versions), SIMATIC ET 200SP IM 155-6 PN HF (All versions < V4.2.2), SIMATIC ET 200SP IM 155-6 PN HS (All versions), SIMATIC ET 200SP IM 155-6 PN ST (All versions), SIMATIC ET 200SP IM 155-6 PN/2 HF (All versions < V4.2.2), SIMATIC ET 200SP IM 155-6 PN/3 HF (All versions < V4.2.1), SIMATIC ET 200ecoPN (except 6ES7148-6JD00-0AB0 and 6ES7146-6FF00-0AB0) (All versions), SIMATIC ET 200pro (All versions), SIMATIC HMI Comfort Outdoor Panels 7" & 15" (All versions), SIMATIC HMI Comfort Panels 4" - 22" (All versions), SIMATIC HMI KTP Mobile Panels (All versions), SIMATIC PN/PN Coupler (All versions), SIMATIC PROFINET Driver (All versions < V2.1), SIMATIC S7-1200 CPU family (incl. F) (All versions), SIMATIC S7-1500 CPU family (incl. F) (All versions < V2.0), SIMATIC S7-300 CPU family (incl. F) (All versions), SIMATIC S7-400 PN/DP V7 (incl. F) (All versions), SIMATIC S7-400 V6 (incl F) and below (All versions), SIMATIC S7-400H V6 (All versions < V6.0.9), SIMATIC S7-410 V8 (All versions), SIMATIC WinAC RTX (F) 2010 (All versions < SIMATIC WinAC RTX 2010 SP3), SINAMICS DCM (All versions < V1.5 HF1), SINAMICS DCP (All versions), SINAMICS G110M V4.7 (PN Control Unit) (All versions < V4.7 SP10 HF5), SINAMICS G120 V4.7 (PN Control Unit) (All versions < V4.7 SP10 HF5), SINAMICS G130 V4.7 (Control Unit) (All versions), SINAMICS G150 (Control Unit) (All versions), SINAMICS GH150 V4.7 (Control Unit) (All versions), SINAMICS GL150 V4.7 (Control Unit) (All versions), SINAMICS GM150 V4.7 (Control Unit) (All versions), SINAMICS S110 (Control Unit) (All versions), SINAMICS S120 V4.7 (Control Unit) (All versions), SINAMICS S150 (Control Unit) (All versions), SINAMICS SL150 V4.7 (Control Unit) (All versions), SINAMICS SM120 V4.7 (Control Unit) (All versions), SINUMERIK 828D (All versions < V4.8 SP5), SINUMERIK 840D sl (All versions). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial-of-service condition. The vulnerability can be triggered if a large amount of specially crafted UDP packets are sent to device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the device. At the time of advisory publication no public exploitation of this security vulnerability was known.