The vulnerability of the microprogrammed software of the MELSEC iQ-R Series Safety CPU and Series SIL2 Process CPU modules lies in the overly restrictive mechanism for blocking user accounts. This allows a malicious person to lock out the user account.

The vulnerability of the microprogrammed software of MELSEC iQ-R Series Safety CPUs and Series SIL2 Process CPUs is related to an overly restrictive mechanism for blocking user accounts. Exploiting this vulnerability could allow a malicious actor to lock out a user’s account by entering a known...