CISA has released an advisory on an improper check for unusual or exceptional conditions vulnerability in Schneider Electric Modicon Controllers. Multiple products and versions of these products are affected. Successful exploitation of this vulnerability could result in a denial-of-service condition. Schneider Electric has developed a series of mitigations and also recommends users follow industry best practices. CISA also recommends a series of measures to mitigate the vulnerability. Read the advisory at CISA.