Modicon m340

This hub aggregates every CVE we track for Modicon m340, a product in the ics ot iot space. Use it to gauge the current risk picture and drill into individual advisories.

Severity distribution

Monthly trend

The 15 most recently published vulnerabilities affecting Modicon m340.

• CVE-2025-6625CWE-20: Improper Input Validation vulnerability exists that could cause a Denial Of Service when specific crafted FTP command is sent to the device.7.5Aug 18, 2025
• CVE-2024-12142CWE-200: Exposure of Sensitive Information to an Unauthorized Actor vulnerability exists that could cause information disclosure of restricted web page, modification of web page and denial of servi...8.6Jan 17, 2025
• CVE-2024-5056CWE-552: Files or Directories Accessible to External Parties vulnerability exists which may prevent user to update the device firmware and prevent proper behavior of the webserver when specific fil...6.5Jun 12, 2024
• CVE-2021-22786A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. A...7.5Feb 1, 2023
• CVE-2022-45789A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the controller when hijacking an authenticated Modbus session....8.1Jan 31, 2023
• CVE-2022-37301A CWE-191: Integer Underflow (Wrap or Wraparound) vulnerability exists that could cause a denial of service of the controller due to memory access violations when using the Modbus TCP protocol. Aff...7.5Nov 22, 2022
• CVE-2022-37300A CWE-640: Weak Password Recovery Mechanism for Forgotten Password vulnerability exists that could cause unauthorized access in read and write mode to the controller when communicating over Modbus....9.8Sep 12, 2022
• CVE-2021-22787A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server of the device. Af...7.5Feb 11, 2022
• CVE-2021-22779Authentication Bypass by Spoofing vulnerability exists in EcoStruxure Control Expert (all versions prior to V15.0 SP1, including all versions of Unity Pro), EcoStruxure Control Expert V15.0 SP1, Ec...9.1Jul 14, 2021
• CVE-2020-7541A CWE-425: Direct Request ('Forced Browsing') vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see sec...5.3Dec 11, 2020
• CVE-2020-7540A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Module...9.8Dec 11, 2020
• CVE-2020-7539A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication...7.5Dec 11, 2020
• CVE-2020-7537A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications ...7.5Dec 11, 2020
• CVE-2020-7562A CWE-125: Out-of-Bounds Read vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details...8.1Nov 18, 2020
• CVE-2020-7563A CWE-787: Out-of-bounds Write vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for detail...8.8Nov 18, 2020