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ModiconM241-M251

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-2025-13901 is a vulnerability classified under CWE-404 (Improper Resource Shutdown or Release) affecting Schneider Electric's Modicon M241 and M251 PLCs, specifically versions prior to 5.4.13.12. The flaw arises from the improper handling of communication channel resources within the Machine Expert protocol stack. An unauthenticated attacker can exploit this by sending specially crafted malicious payloads that occupy active communication channels, preventing legitimate communication and causing a partial denial of service. This resource exhaustion disrupts the PLC's ability to process normal commands, potentially halting or degrading industrial automation processes controlled by these devices. The vulnerability is remotely exploitable without any authentication or user interaction, increasing its risk profile. Although no public exploits are currently known, the vulnerability's presence in widely deployed industrial control hardware makes it a significant concern. The CVSS 4.0 base score is 6.9, reflecting medium severity due to network attack vector, low attack complexity, and no privileges or user interaction required. The vulnerability does not affect confidentiality or integrity directly but impacts availability by causing service disruption. Schneider Electric has addressed this issue in firmware version 5.4.13.12 and later. Organizations using affected PLCs should prioritize patching and consider additional network-level protections to mitigate exploitation risks.

Detailed information about CVE-2025-13901: CWE-404 Improper Resource Shutdown or Release in Schneider Electric Modicon M241/M251 affecting Schneider Electric Mo

CVE-2025-13901: CWE-404 Improper Resource Shutdown or Release in Schneider Electric Modicon M241/M251 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-13901: CWE-404 Improper Resource Shutdown or Release in Schneider Electric Modicon M241/M251

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