CVE-2025-47759: Stack-Based Buffer Overflow in V-SFT v6.2.5.0 and Earlier

Overview

CVE-2025-47759 is a severe cybersecurity vulnerability that affects V-SFT v6.2.5.0 software and earlier versions. This vulnerability has to do with a stack-based buffer overflow located in the VS6ComFile!CV7BaseMap::WriteV7DataToRom function. The issue arises when opening specially crafted V7 or V8 files, which can lead to a crash, information disclosure, and even arbitrary code execution.
The vulnerability is of particular concern due to its potential to compromise systems and leak sensitive data. As these consequences can have a significant impact on both businesses and individuals who rely on the V-SFT software, addressing CVE-2025-47759 is a critical task for cybersecurity professionals.

Vulnerability Summary

CVE ID: CVE-2025-47759
Severity: High (7.8 CVSS Score)
Attack Vector: Local File Input
Privileges Required: Low
User Interaction: Required
Impact: System crash, sensitive information disclosure, and arbitrary code execution

Affected Products

Product | Affected Versions

V-SFT | v6.2.5.0 and earlier

How the Exploit Works

The exploit for CVE-2025-47759 takes advantage of a stack-based buffer overflow vulnerability in the VS6ComFile!CV7BaseMap::WriteV7DataToRom function. This is triggered when the user opens a specially crafted V7 or V8 file. The buffer overflow can lead to memory corruption, which can result in a system crash or, worse, the execution of arbitrary code. This implies that an attacker could take control of the system or access sensitive information that should have been protected.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited:

# Pseudocode for exploit
def exploit(vulnerable_file):
crafted_data = get_crafted_data()  # Get the specially crafted data that overflows the buffer
file = open(vulnerable_file, 'w')
file.write(crafted_data)  # Write the crafted data to the file
file.close()
open_v7_v8_file(vulnerable_file)  # Open the file using the vulnerable function
exploit('vulnerable.v7')

Please note that this is a mere conceptual representation of how the exploit might work. Actual exploitation will involve much more complex steps and knowledge of the underlying software’s architecture.