Description

A maliciously crafted PDF file, when parsed through Autodesk Revit, can force an Out-of-Bounds Write vulnerability. A malicious actor may leverage this vulnerability to cause a crash, cause data corruption, or execute arbitrary code in the context of the current process.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-06T22:18:33.243Z",
  "pubdate": "2026-08-06T22:18:33.243Z",
  "executiveSummary": "An Out-of-Bounds Write vulnerability exists within Autodesk Revit when parsing maliciously crafted PDF files. The flaw arises during the internal processing and interpretation of structural data contained within the PDF document format by the affected software component.\nSuccessful exploitation of this vulnerability can lead to severe security implications, including application crashes, unauthorized data corruption, or the execution of arbitrary code within the execution context of the currently logged-in process. This poses a significant risk to system integrity and user data confidentiality.\nThe attacker capabilities include the potential for arbitrary code execution if the memory corruption is leveraged deterministically. To achieve exploitation, a malicious actor requires user interaction, specifically tricking a victim into opening a specially crafted PDF file using Autodesk Revit.\nThe affected product is Autodesk Revit. Given the severity of potential remote code execution via untrusted file inputs, organizations utilizing the software should treat this vulnerability with high priority, ensuring rigorous input validation practices and restricting the opening of untrusted files from external sources.",
  "technicalDetails": "The vulnerability is classified as an Out-of-Bounds Write, occurring within the memory management and parsing logic of Autodesk Revit when it ingests PDF files. The root cause stems from insufficient bounds checking and input validation prior to writing parsed data into pre-allocated memory buffers or heap structures.\nDuring the attack flow, a malicious actor crafts a specialized PDF file containing malformed structural elements, object streams, or dimension parameters designed to violate expected size constraints. When Autodesk Revit parses this file, the vulnerable component calculates incorrect buffer offsets based on untrusted inputs derived directly from the file structure.\nAs the parser processes the malicious PDF, it performs write operations past the boundaries of the intended destination buffer. This memory corruption overwrites adjacent heap metadata, critical application state variables, or function pointers depending on the memory layout and heap arrangement at the time of execution.\nRegarding authentication, privileges, and network exposure, the vulnerability does not inherently require network access, as exploitation is driven locally via file parsing. No prior authentication is required, but the attack strictly depends on local user interaction to open the malicious PDF file within Autodesk Revit. The privilege requirements are limited to the user context under which Autodesk Revit is executing.\nThe payload behavior leverages the Out-of-Bounds write primitive to manipulate application control flow. By carefully controlling the size and content of the out-of-bounds write, an attacker can achieve arbitrary code execution in the context of the current process, potentially leading to full system compromise or persistence depending on user privileges."
}