View CSAF Summary An unauthenticated remote attacker can exploit a hidden function in the CLI prompt to escape the restricted interface, leading to full compromise of the device. The following versions of WAGO GmbH & Co. S1 WAGO_Hardware_852-1813/010-001 (CVE-2026-3587) CVSS Vendor Equipment Vulnerabilities v3 10 WAGO WAGO GmbH & Co. KG Industrial Managed Switches Hidden Functionality Background Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy, Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-3587 An unauthenticated remote attacker can exploit a hidden function in the CLI prompt to escape the restricted interface, leading to full compromise of the device.
View CVE Details Affected Products WAGO GmbH & Co. S1: WAGO_Hardware_852-1813/010-001 Product Status:known_affected Remediations MitigationWAGO has identified the following specific workarounds and mitigations users can apply to reduce risk: Product Group: WAGO Firmware installed on WAGO Hardware 852-1812, WAGO Firmware installed on WAGO Hardware 852-1813, WAGO Firmware installed on WAGO Hardware 852-1813/000-001, WAGO Firmware installed on WAGO Hardware 852-1816, WAGO Firmware installed on WAGO Hardware 852-303, WAGO Firmware installed on WAGO Hardware 852-1305, WAGO Firmware installed on WAGO Hardware 852-1305/000-001, WAGO Firmware installed on WAGO Hardware 852-1505/000-001, WAGO Firmware installed on WAGO Hardware 852-1505, WAGO Firmware installed on WAGO Hardware 852-602, WAGO Firmware installed on WAGO Hardware 852-603, WAGO Firmware installed on WAGO Hardware 852-1605, WAGO Firmware installed on WAGO Hardware 852-1812/010-000, WAGO Firmware installed on WAGO Hardware 852-1813/010-000, WAGO Firmware installed on WAGO Hardware 852-1816/010-000, WAGO Firmware installed on WAGO Hardware 852-602, WAGO Firmware installed on WAGO Hardware 852-603, WAGO Firmware installed on WAGO Hardware 852-1505, WAGO Firmware installed on WAGO Hardware 852-1305, WAGO Firmware installed on WAGO Hardware 852-1305/000-001, WAGO Firmware installed on WAGO Hardware 852-1505/000-001, WAGO Firmware installed on WAGO Hardware 852-1812, WAGO Firmware installed on WAGO Hardware 852-1813, WAGO Firmware installed on WAGO Hardware 852-1816, WAGO Firmware installed on WAGO Hardware 852-1812/010-000, WAGO Firmware installed on WAGO Hardware 852-1813/010-000, WAGO Firmware installed on WAGO Hardware 852-1816/010-000, WAGO Firmware installed on WAGO Hardware 852-1813/000-001, WAGO Firmware installed on WAGO Hardware 852-1605, WAGO Firmware installed on WAGO Hardware 852-303, WAGO Firmware installed on WAGO Hardware 852-1813/010-001, WAGO Firmware installed on WAGO Hardware 852-1813/010-001): Please update your devices to the specified fixed Firmware version.
MitigationLean Managed Switch 852-1812, Lean Managed Switch 852-1813, Lean Managed Switch 852-1813/000-001, Lean Managed Switch 852-1816, Lean Managed Switch 852-1812/010-000, Lean Managed Switch 852-1813/010-000, Lean Managed Switch 852-1816/010-000, Lean Managed Switch 852-1813/010-001: To eliminate the attack vector deactivate ssh and telnet on the device. MitigationIndustrial Managed Switch 852-303, Industrial Managed Switch 852-1305, Industrial Managed Switch 852-1305/000-001, Industrial Managed Switch 852-1505/000-001, Industrial Managed Switch 852-1505, Industrial Managed Switch 852-602, Industrial Managed Switch 852-603, Industrial Managed Switch 852-1605: To reduce the attack vector deactivate ssh and telnet on the devices.
This ensures that the CLI is only accessible locally via RS232. S1 installed on Lean Managed Switch 852-1813/010-001 are fixed versions for CVE-2026-3587 MitigationFor more information see the associated WAGO GmbH & Co. com/de-en/automation-technology/psirt. com/en/advisories/VDE-2026-020. com/de-en/automation-technology/psirt MitigationFor more information see the associated WAGO GmbH & Co. com/de-en/automation-technology/psirt. com/en/advisories/VDE-2026-020. com/en/advisories/VDE-2026-020 MitigationFor more information see the associated WAGO GmbH & Co.
com/de-en/automation-technology/psirt. com/en/advisories/VDE-2026-020. gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs).
Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-03-26 Date Revision Summary 2026-03-26 1 Initial Republication of WAGO GmbH & Co.