Description

A maliciously crafted PDF file, when parsed through Autodesk Revit, can force a Use-After-Free vulnerability. A malicious actor can leverage this vulnerability to cause a crash, disclose sensitive data, or execute arbitrary code in the context of the current process.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-06T22:17:00.373Z",
  "pubdate": "2026-08-06T22:17:00.373Z",
  "executiveSummary": "A Use-After-Free vulnerability exists within Autodesk Revit when parsing maliciously crafted PDF files. This security flaw enables a threat actor to trigger application crashes, conduct sensitive data disclosure, or achieve arbitrary code execution within the execution context of the current process.\nThe risk implication is critical, as successful exploitation compromises the confidentiality, integrity, and availability of the host system. The attack vector requires the target user to process a malicious PDF file using vulnerable versions of Autodesk Revit.\nAttacker capabilities include arbitrary code execution under the privileges of the active user session. Mitigation relies on applying vendor-supplied security updates and avoiding untrusted PDF files within the software.",
  "technicalDetails": "The vulnerability resides in the memory management logic of Autodesk Revit during the parsing and processing of PDF document structures. Specifically, a Use-After-Free condition occurs when the application references a memory heap location after it has been deallocated.\nThe attack flow begins when a user opens or imports a maliciously crafted PDF file within Autodesk Revit. The parsing engine improperly handles object references and memory lifecycle events, resulting in a dangling pointer. When the application subsequently attempts to access the freed memory chunk, the memory manager encounters an invalid state.\nBy carefully manipulating heap allocations prior to the dangling pointer reference, an attacker can replace the freed memory block with controlled payload data. This manipulation allows the attacker to hijack the instruction pointer or corrupt critical application structures, leading to arbitrary code execution in the context of the current process.\nExploitation requires local user interaction to open the malicious file. Network exposure is indirect, relying on the delivery of the crafted PDF document via email, web downloads, or shared repositories. Privileged access is not required initially, as the code executes with the standard permissions of the user running Autodesk Revit."
}