Schneider Electric Plant iT/Brewmaxx

Summary

Schneider Electric disclosed four critical vulnerabilities (CVE-2025-49844, CVE-2025-46817, CVE-2025-46818, CVE-2025-46819) in Plant iT/Brewmaxx 9.60 and above, stemming from insecure Redis implementations in versions 8.2.1 and below. Authenticated attackers can exploit specially crafted Lua scripts to trigger use-after-free, integer overflow, code injection, and denial-of-service conditions, potentially achieving remote code execution. Schneider Electric released patch ProLeiT-2025-001 and recommends immediate mitigation including disabling Redis eval commands and enforcing secure configuration templates.

Full text

ICS Advisory Schneider Electric Plant iT/Brewmaxx Release DateMarch 24, 2026 Alert CodeICSA-26-083-03 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could risk privilege escalation, which could result in remote code execution. The following versions of Schneider Electric Plant iT/Brewmaxx are affected: Plant iT/Brewmaxx 9.60_and_above (CVE-2025-49844, CVE-2025-46817, CVE-2025-46818, CVE-2025-46819) CVSS Vendor Equipment Vulnerabilities v3 9.9 Schneider Electric Schneider Electric Plant iT/Brewmaxx Use After Free, Integer Overflow or Wraparound, Improper Control of Generation of Code ('Code Injection') Background Critical Infrastructure Sectors: Energy, Critical Manufacturing, Commercial Facilities Countries/Areas Deployed: Worldwide Company Headquarters Location: France Vulnerabilities Expand All + CVE-2025-49844 The affected product uses Redis, an open-source, in-memory database. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free, and potentially lead to remote code execution. View CVE Details Affected Products Schneider Electric Plant iT/Brewmaxx Vendor:Schneider Electric Product Version:Schneider Electric Plant iT/Brewmaxx: 9.60_and_above Product Status:known_affected Remediations MitigationSchneider Electric recommends users immediately apply the following mitigations to reduce the risk of exploit: MitigationInstall Patch ProLeiT-2025-001 via ProLeiT Supporthttps://www.proleit.com/support/ MitigationAfter installing ProLeiT-2025-001, disable the eval commands in Redis on the application server, VisuHub, engineering workstations, and workstations with emergency mode functionality MitigationForce usage of secure Redis configuration templates in system settings as documented in the patch manual MitigationRestart all patched servers and workstations MitigationSchneider Electric strongly recommends the following industry cybersecurity best practices. MitigationLocate control and safety system networks and remote devices behind firewalls and isolate them from the business network. MitigationInstall physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks. MitigationPlace all controllers in locked cabinets and never leave them in the "Program" mode. MitigationNever connect programming software to any network other than the network intended for that device. MitigationScan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. before use in the terminals or any node connected to these networks. MitigationNever allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation. MitigationMinimize network exposure for all control system devices and systems and ensure that they are not accessible from the Internet. MitigationWhen remote access is required, use secure methods, such as virtual private networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices. MitigationFor more information refer to the Schneider Electric Recommended Cybersecurity Best Practices document.https://www.se.com/us/en/download/document/7EN52-0390/ Vendor fixFor more information, see Schneider Electric security notification "SEVD-2026-013-01 Multiple Third-Party Vulnerabilities on ProLeiT Plant iT/Brewmaxx"https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-013-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-013-01.pdf Relevant CWE: CWE-416 Use After Free Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.9 CRITICAL CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2025-46817 The affected product uses Redis, an open-source, in-memory database. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to cause an integer overflow and potentially lead to remote code execution View CVE Details Affected Products Schneider Electric Plant iT/Brewmaxx Vendor:Schneider Electric Product Version:Schneider Electric Plant iT/Brewmaxx: 9.60_and_above Product Status:known_affected Remediations MitigationSchneider Electric recommends users immediately apply the following mitigations to reduce the risk of exploit: MitigationInstall Patch ProLeiT-2025-001 via ProLeiT Supporthttps://www.proleit.com/support/ MitigationAfter installing ProLeiT-2025-001, disable the eval commands in Redis on the application server, VisuHub, engineering workstations, and workstations with emergency mode functionality MitigationForce usage of secure Redis configuration templates in system settings as documented in the patch manual MitigationRestart all patched servers and workstations MitigationSchneider Electric strongly recommends the following industry cybersecurity best practices. MitigationLocate control and safety system networks and remote devices behind firewalls and isolate them from the business network. MitigationInstall physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks. MitigationPlace all controllers in locked cabinets and never leave them in the "Program" mode. MitigationNever connect programming software to any network other than the network intended for that device. MitigationScan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. before use in the terminals or any node connected to these networks. MitigationNever allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation. MitigationMinimize network exposure for all control system devices and systems and ensure that they are not accessible from the Internet. MitigationWhen remote access is required, use secure methods, such as virtual private networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices. MitigationFor more information refer to the Schneider Electric Recommended Cybersecurity Best Practices document.https://www.se.com/us/en/download/document/7EN52-0390/ Vendor fixFor more information, see Schneider Electric security notification "SEVD-2026-013-01 Multiple Third-Party Vulnerabilities on ProLeiT Plant iT/Brewmaxx"https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-013-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-013-01.pdf Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 7 HIGH CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2025-46818 The affected product uses Redis, an open-source, in-memory database. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate different LUA objects and potentially run their own code in the context of another user. View CVE Details Affected Products Schneider Electric Plant iT/Brewmaxx Vendor:Schneider Electric Product Version:Schneider Electric Plant iT/Brewmaxx: 9.60_and_above Product Status:known_affected Remediations MitigationSchneider Electric recommends users immediately apply the following mitigations to reduce the risk of exploit: MitigationInstall Patch ProLeiT-2025-001 via ProLeiT Supporthttps://www.proleit.com/support/ MitigationAfter installing ProLeiT-2025-001, disable the eval commands in Redis on the application server, VisuHub, engineering workstations, and workstations with emergency mode functionality MitigationForce usage of secure Redis config

Indicators of Compromise

• cve — CVE-2025-49844
• cve — CVE-2025-46817
• cve — CVE-2025-46818
• cve — CVE-2025-46819
• malware — ProLeiT-2025-001