CISA has published an advisory on a NULL pointer reference vulnerability in 3S-Smart Software Solutions GmbH CODESYS Control V3 OPC UA Server. Numerous products and versions of these products are affected. Successful exploitation of this vulnerability could cause a denial-of-service condition. 3S-Smart Software Solutions GmbH has released Version 188.8.131.52 to resolve this vulnerability for all affected CODESYS products. CISA also recommends a series of measures for mitigating the vulnerability. Read the advisory at CISA.