CVE-2026-107896 in V-SFT
Summary
by MITRE • 10/26/2026
V-SFT provided by FUJI ELECTRIC CO., LTD. contains an out-of-bounds read vulnerability in VS6ComFile!load_gr_item. Opening a crafted V7 file may lead to information exposure or arbitrary code execution on the affected product.
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Analysis
by VulDB Data Team • 10/26/2026
The software component known as V-SFT, developed and distributed by FUJI ELECTRIC CO., LTD., contains a critical memory safety vulnerability located within the VS6ComFile!load_gr_item function. This specific routine is responsible for parsing graphical file formats associated with the V7 series of industrial automation products. The flaw manifests as an out-of-bounds read condition, which occurs when the application attempts to access memory locations that lie outside the intended buffer boundaries during the processing of a specially crafted input file. Such vulnerabilities are typically rooted in insufficient validation of array indices or pointer arithmetic operations before accessing data structures loaded from external files. In this context, the parser fails to adequately verify whether the requested offset or length parameter remains within the allocated limits of the target memory region, allowing for unauthorized access to adjacent memory contents.
From a technical perspective, an out-of-bounds read vulnerability represents a significant security risk because it violates the principle of least privilege regarding memory access. When the application reads data beyond its designated buffer, it may retrieve sensitive information stored in neighboring memory locations that were not intended for public consumption. This can lead to direct information exposure, where internal state variables, cryptographic keys, or other confidential data are leaked into the output stream or logged files. Furthermore, depending on how the read data is subsequently utilized by the application logic, this flaw can be chained with other vulnerabilities to facilitate arbitrary code execution. For instance if the out-of-bounds data influences control flow decisions or pointer values used later in the program's lifecycle, an attacker could potentially manipulate these values to redirect execution to malicious shellcode injected into the process memory space.
The operational impact of this vulnerability is particularly severe given its presence in industrial control systems and automation software. V-SFT tools are often deployed in critical infrastructure environments where reliability and security are paramount. An adversary who can exploit this flaw by tricking a user or an automated system into opening a maliciously crafted V7 file could achieve remote code execution without authentication if the application is configured to auto-process incoming files, or local privilege escalation through social engineering tactics targeting operators. The ability to execute arbitrary code on such systems poses a direct threat to operational continuity and physical safety. Attackers could potentially disrupt production lines, manipulate process parameters, or use the compromised system as a pivot point for further lateral movement within the corporate network. This aligns with common attack patterns observed in industrial cyber threats where initial access is gained through deceptive file delivery mechanisms targeting engineering workstations.
This vulnerability maps directly to CWE-125 Out-of-bounds Read from the Common Weakness Enumeration standard, which categorizes flaws involving reading beyond allocated memory boundaries. In terms of offensive security frameworks, this exploit vector corresponds to ATT&CK technique T1083 File and Directory Discovery or potentially T1046 Network Service Scanning if used for reconnaissance, but more critically it serves as a precursor to T1203 Exploitation for Client Execution when leveraged via malicious files. The mitigation strategy must prioritize immediate patching of the VS6ComFile module with updates provided by FUJI ELECTRIC CO., LTD that enforce strict bounds checking on all memory access operations within load_gr_item. Organizations should also implement network segmentation to isolate engineering workstations from general corporate networks and restrict file execution policies using application whitelisting solutions. Additionally, security awareness training for personnel handling V7 project files is essential to prevent accidental opening of untrusted artifacts, while intrusion detection systems should be tuned to detect anomalous memory access patterns or unusual process behavior indicative of exploitation attempts against industrial software suites.