Schneider-Electric Modicon M241 Firmware vulnerabilities

CVE-2017-6026 [CRITICAL] CWE-330 CVE-2017-6026: A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modico A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The session numbers generated by the web application are lacking randomization and are shared between several users. This may allow a c

CVE-2017-6028 [CRITICAL] CWE-522 CVE-2017-6028: An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modi An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.

CVE-2021-22699 [HIGH] CWE-20 CVE-2021-22699: Improper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior Improper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior to V5.1.9.1 that could cause denial of service when specific crafted requests are sent to the controller over HTTP.

CVE-2017-6030 [MEDIUM] CWE-343 CVE-2017-6030: A predictable value range from previous values issue was discovered in Schneider Electric Modicon PL A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial seque

CVE-2025-13901 [MEDIUM] CWE-404 CVE-2025-13901: CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial o CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial of Service on Machine Expert protocol when an unauthenticated attacker sends malicious payload to occupy active communication channels.

CVE-2025-13902 [MEDIUM] CWE-79 CVE-2025-13902: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerab CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause condition where authenticated attackers can have a victim’s browser run arbitrary JavaScript when the victim hovers over a maliciously crafted element on a web server containing the injected payload.