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How CVE-2025-7256 Works
The vulnerability exists in the IrfanView CADImage Plugin’s handling of DXF files. Due to insufficient validation of user-supplied data during DXF file parsing, a memory corruption condition occurs. Attackers craft malicious DXF files containing oversized or malformed data structures, triggering heap-based buffer overflows or use-after-free scenarios. When the victim opens the malicious file, the corrupted memory allows arbitrary code execution within the context of IrfanView’s process. Exploitation requires user interaction (e.g., opening a file from an untrusted source).
DailyCVE Form
Platform: IrfanView CADImage Plugin
Version: <= 4.60
Vulnerability: Memory Corruption
Severity: Critical
Date: 2025-07-25
Prediction: Patch by 2025-08-15
What Undercode Say
Analytics:
strings malicious.dxf | grep "ENTITIES" gdb -ex "run malicious.dxf" irfanview !exploitable -v crash_dump.dmp
How Exploit:
with open("exploit.dxf", "wb") as f:
f.write(b"\x41" 5000 + struct.pack("<I", 0xdeadbeef))
Protection from this CVE:
– Disable CADImage Plugin
– Apply vendor patch
– Restrict DXF file access
Impact:
– Remote Code Execution
– System Compromise
– Data Exfiltration
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
