Schneider Electric · Modicon M251 · CVE-2017-6026
**Name of the Vulnerable Software and Affected Versions**
Modicon M241 versions prior to 4.0.5.11
Modicon M251 versions prior to 4.0.5.11
**Description**
A Use of Insufficiently Random Values issue was discovered, where the session numbers generated by the web application lack randomization and are shared between several users. This may allow a current session to be compromised.
**Recommendations**
For Modicon M241 versions prior to 4.0.5.11, update to version 4.0.5.11 or later to resolve the issue.
For Modicon M251 versions prior to 4.0.5.11, update to version 4.0.5.11 or later to resolve the issue.