{"id":86902,"date":"2026-04-08T22:22:57","date_gmt":"2026-04-08T22:22:57","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-7731-cleartext-transmission-of-sensitive-information-vulnerability-in-mitsubishi-electric-corporation-melsec-iq-f-series","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7731-cleartext-transmission-of-sensitive-information-vulnerability-in-mitsubishi-electric-corporation-melsec-iq-f-series\/","title":{"rendered":"CVE-2025-7731: Cleartext Transmission of Sensitive Information Vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The Cybersecurity Vulnerability CVE-2025-7731 impacts the Mitsubishi Electric Corporation’s MELSEC iQ-F Series CPU modules. This vulnerability exposes sensitive information in plaintext, making it easily accessible by unauthorized individuals. The susceptibility has serious implications for businesses utilizing these CPU modules as it exposes them to potential data leakage and system compromises.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-7731
\nSeverity: High (CVSS Score: 7.5)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: A successful exploit could lead to unauthorized access and control of the system leading to data leakage and compromise of the system’s operations.<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module | All existing versions<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of the cleartext transmission of sensitive information in the MELSEC iQ-F Series CPU module. An unauthorized, remote attacker can intercept SLMP communication messages to obtain credential information. With this information, they can read or write the device values of the product and halt the operations of the system’s programs.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Although the exact method of exploit is dependent on the attacker’s approach and tools, a conceptual example might involve intercepting and analyzing network traffic to extract sensitive information. The following is a hypothetical command using tcpdump, a common network packet analyzer.<\/p>\n

tcpdump -i eth0 'port 44818'<\/code><\/pre>\n
This command would capture packets on the Ethernet interface ‘eth0’ on port 44818, commonly used by SLMP communication, potentially revealing sensitive cleartext information.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To mitigate this vulnerability, apply the vendor’s patch immediately once it becomes available. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) is recommended to monitor and control incoming and outgoing network traffic based on predetermined security rules.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The Cybersecurity Vulnerability CVE-2025-7731 impacts the Mitsubishi Electric Corporation’s MELSEC iQ-F Series CPU modules. This vulnerability exposes sensitive information in plaintext, making it easily accessible by unauthorized individuals. The susceptibility has serious implications for businesses utilizing these CPU modules as it exposes them to potential data leakage and system compromises. Vulnerability Summary CVE ID: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86902","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t