CVE-2026-16782

Executive Summary

CVE-2026-16782 is an Out-of-Bounds Read vulnerability in Autodesk 3ds Max affecting the parsing of maliciously crafted SVG files. An attacker exploiting this flaw can trigger a crash, read sensitive data from memory, or theoretically execute arbitrary code within the context of the current process. The vulnerability is remotely exploitable without authentication or user privileges, but requires user interaction (opening a malicious file). As of the latest data, no patch is available, no public proof-of-concept exists, and the vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog. The CVSS v3.1 base score is 5.3 (Medium) with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Technical Analysis

CVE-2026-16782 is classified as a CWE-125 (Out-of-Bounds Read) vulnerability. The flaw resides within the SVG parsing capability of Autodesk 3ds Max, a widely used 3D modeling and rendering application in industries such as architecture, engineering, construction, media, and entertainment. When the application processes a crafted Scalable Vector Graphics (SVG) file, a read operation is performed beyond the boundaries of an allocated memory buffer.

The NVD description indicates three potential outcomes of exploitation: crash (denial-of-service), read sensitive data (information disclosure), and arbitrary code execution in the context of the current process. The last outcome suggests that the Out-of-Bounds Read may, in certain controlled conditions, be leveraged to access pointers or other memory structures that could enable further exploitation, potentially escalating to arbitrary code execution, although the CVSS vector specifies only a confidentiality impact (C:L) and no integrity or availability impact.

The vulnerability class (CWE-125) is characterized by the application reading data from a memory location that is outside the bounds of an allocated, valid, and readable memory region. In the context of file parsers, Out-of-Bounds Read flaws typically arise from:

• Insufficient bounds checking on length fields embedded in parsed files
• Arithmetic overflow leading to undersized buffer allocations
• Off-by-one errors in index calculations
• Incorrect handling of nested or recursive structures within the file format (SVG, being XML-based, supports nested elements, Unicode text, base64-encoded embedded content, and transforms that can stress parser state)

Given that SVG is an XML-based vector image format, the parser must handle elements such as <path>, <circle>, <text>, <g>, gradients, filters, and potentially embedded scripts. A malicious SVG can exploit logical errors in the handling of coordinate values, path data string parsing, or attribute length calculations to force a read past the end of an internal buffer.

Insufficient technical detail is available from the CNA/NVD descriptions to identify specific function names, code paths, or parser components affected. The parser internals are not disclosed in the published data. What is known is that the attack vector is local (file parsing) with a network component in the sense that the attacker can craft the file remotely and deliver it to the victim; however, user interaction (opening the file) is required, although the CVSS vector lists UI:N (user interaction = none), which may reflect that the parsing occurs automatically upon file open, or the interaction is implicit.

The absence of patch evidence from any tracked source gives this a Patch Confidence of 0/4, indicating an unpatched status. Affected version ranges have not been disclosed by the vendor, making it impossible to enumerate affected releases with certainty.

Exploitation Scenarios

Based strictly on the NVD description and the CWE-125 vulnerability class, the attack chain for CVE-2026-16782 is as follows:

1. Reconnaissance / Target Identification: An attacker identifies organizations or individuals using Autodesk 3ds Max. This can be accomplished via job postings, portfolio sites, industry-specific forums (e.g., CGI, architecture, game development forums), LinkedIn profiles, or social engineering to determine software usage. The attacker's goal is to find victims who will open a file with the vulnerable application.

2. Crafting the Malicious File: No public proof-of-concept exists; however, from the vulnerability class, the attacker would craft an SVG file containing specifically malformed data designed to trigger the Out-of-Bounds Read. In the absence of public detail, this likely involves carefully manipulating SVG elements or attributes (e.g., extremely long coordinate lists, deeply nested XML structures, excessively large or negative integer values in attributes, or Unicode escape sequences that cause incorrect length calculations) so that the parser reads beyond the bounds of a buffer. The attacker would not have access to the exact vulnerable code path without reverse engineering; however, fuzzing the file parser could identify the specific trigger condition.

3. Delivery and Execution: The attacker delivers the malicious SVG file to the victim through common channels: email attachment, downloadable link, USB drive, or hosting on a malicious website (drive-by download). The CVSS vector AV:N/AC:L indicates the attack is network-deliverable and of low complexity, but the victim must open the file within 3ds Max (the file parsing is triggered by explicitly opening the file; there is no indication of automatic parsing of SVG from the web browser). The low attack complexity suggests that once the file reaches the target, exploitation does not require special conditions.

4. Post-Exploitation Impact: The Out-of-Bounds Read can cause the application to crash (denial of service), which may be used to disrupt a user's workflow or to cause consequential data loss if unsaved work is in memory. More critically, the out-of-bounds read may allow the attacker to read sensitive data from process memory — this could include portions of other files loaded in memory, scene data, authentication tokens (if stored in the application's memory), or the contents of other memory regions used by the process. In a best-case scenario for the attacker, the out-of-bounds read is chained with a memory corruption primitive to achieve arbitrary code execution with the privileges of the user running 3ds Max. If the user is running with administrative privileges, this could result in full system compromise. However, the CVSS vector (C:L/I:N/A:N) suggests the primary impact is limited confidentiality exposure; the NVD description nonetheless mentions crash and code execution possibilities.

No public PoC is available; the attack chain described above is inferred from the vulnerability class and the NVD description.

Impact Assessment

Business Impact: Autodesk 3ds Max is a professional tool used in the architecture, engineering, construction, film, television, video game, and product design industries. A compromise of this tool could expose intellectual property, unreleased creative work, client data, and proprietary scene files. The disclosure of sensitive memory contents (C:L, confidentiality: low) can leak fragments of other documents or credentials residing in the same process memory.

Affected Systems: Any system running a vulnerable build of Autodesk 3ds Max. The exact vulnerable versions have not been disclosed, meaning the entire product line may be at risk until a patch or advisory is issued.

Blast Radius / CVSS Subscores: The CVSS v3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N translates to:

• Attack Vector: Network — the crafted file can be delivered remotely
• Attack Complexity: Low — no special conditions are needed to exploit
• Privileges Required: None — the attacker needs no account or special privileges on the target system
• User Interaction: None — although a user must open the file, the CVSS treats UI as not required, which may reflect that opening a file is considered standard usage (or the parsing is automatic)
• Scope: Unchanged — the exploited vulnerability cannot affect components outside the 3ds Max process
• Confidentiality: Low — limited information disclosure possible
• Integrity: None — no data modification impact confirmed
• Availability: None — the CVSS scoring does not include a direct availability impact, although a crash is possible per the description

The medium severity score of 5.3 reflects the limited direct scope but the serious potential for privilege escalation when chained with other vulnerabilities.

Detection Guidance

Sigma Rule

title: Autodesk 3ds Max SVG Out-of-Bounds Read Attempt
id: 9f51a8a2-33df-4f8c-abcd-1234567890ab
status: experimental
description: Detects the opening of suspicious SVG files that may exploit CVE-2026-16782 in Autodesk 3ds Max.
author: ValtersIT Threat Intelligence
date: 2026/06/01
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\\3dsmax.exe'
        CommandLine|contains: '.svg'
    condition: selection
level: high
falsepositives:
    - Legitimate SVG file imports by users
tags:
    - attack.t1203
    - cve.2026.16782

YARA Rule

rule autodesk_3dsmax_cve_2026_16782 {
    meta:
        author = "ValtersIT Threat Intelligence"
        description = "Detects malicious SVG files targeting Autodesk 3ds Max Out-of-Bounds Read"
        reference = "CVE-2026-16782"
        date = "2026-06-01"
    strings:
        $svg_open = "<svg" ascii nocase
        $svg_close = "</svg>" ascii nocase
        $path_elem = "<path" ascii nocase
        $polyline_elem = "<polyline" ascii nocase
        $recursive_elem = /<[a-zA-Z]+[^>]*>\s*<\1/ ascii
    condition:
        uint32be(0) == 0x3c737667 or $svg_open and $svg_close and 1 of ($path_elem, $polyline_elem) and #recursive_elem > 10
}

Suricata IDS Rule

alert http any any -> any any (msg:"Autodesk 3ds Max CVE-2026-16782 SVG download attempt"; flow:to_client,established; filemagic:"SVG"; fileext:"svg"; filestore; reference:cve,2026-16782; classtype:attempted-user; sid:2026060101; rev:1;)

Elastic Detection

process where event.action == "start" and process.name == "3dsmax.exe" and
  process.args : "*.svg" 

Splunk SPL Query

index=windows sourcetype=WinEventLog:Security OR sourcetype=process_creation 
| search process_name="3dsmax.exe" OR Image="*3dsmax.exe" 
| search (CommandLine="*.svg" OR command_line="*.svg") 
| table _time, host, user, process_name, Image, CommandLine 
| stats count by host, user, process_name

Wazuh OSSEC Rule

<group name="autodesk_3dsmax,">
  <rule id="100401" level="12">
    <if_sid>550</if_sid>
    <match>3dsmax.exe</match>
    <regex>\.svg</regex>
    <description>Autodesk 3ds Max opened an SVG file - possible CVE-2026-16782 exploitation</description>
    <group>attack.t1203,cve_2026_16782,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch Confidence: 0/4 — UNPATCHED. No patch evidence from any tracked source. No vendor fix available. No workarounds published.

1. Immediate Mitigations:

   • Do not open SVG files from untrusted or unknown sources within Autodesk 3ds Max
   • Educate users, especially those in architecture/design workflows, about phishing via file attachments containing SVG files
   • Use an enterprise content filter or antivirus that scans incoming SVG files for known malicious patterns (note: since no PoC or detection signature exists, this will be limited)
   • If 3ds Max is not essential for a user role, remove or restrict its installation
   • Run 3ds Max under a least-privileged user account to limit the impact of any code execution
   • Consider isolating 3ds Max in a sandbox or virtual machine for processing untrusted files

2. Patch / Upgrade Steps:

   • Monitor Autodesk's security advisories and the official NVD page for CVE-2026-16782 for any newly released patches
   • Subscribe to Autodesk Security Advisories notifications through their support portal
   • Apply vendor patches as soon as they become available; until then, assume the vulnerability is exploitable in all current versions

3. Long-Term Hardening:

   • Establish a policy to convert SVG files to a safe format (e.g., PNG or PDF) before opening in 3ds Max, using third-party converters that are not affected or are patched
   • Implement application allowlisting to prevent files with .svg extension from being opened in critical environments
   • Enable Windows Defender Exploit Guard or equivalent EDR controls to mitigate the impact of memory corruption exploits
   • Ensure antivirus definitions are updated; although no signature exists for this specific CVE, the updates may catch related in-the-wild variants
   • Regularly review and test industrial-design toolchains for exposure to file-based attack vectors

References

1. NVD — CVE-2026-16782 National Vulnerability Database entry: https://nvd.nist.gov/vuln/detail/CVE-2026-16782 (contains the official CVE description and CVSS score)
2. Autodesk Security Advisories (official vendor advisories — monitor for future updates): https://www.autodesk.com/trust/security-advisories
3. MITRE ATT&CK Technique T1203 — Exploitation for Client Execution: https://attack.mitre.org/techniques/T1203/
4. CISA Known Exploited Vulnerabilities Catalog (CVE-2026-16782 is NOT listed — status: NO): https://www.cisa.gov/known-exploited-vulnerabilities-catalog
5. FIRST.org EPSS — CVE-2026-16782 score not yet available: https://www.first.org/epss/

Threat Actor Campaigns / Exploit-in-the-Wild Evidence: No public knowledge of exploitation campaigns using CVE-2026-16782 exists at the time of writing. No exploit code, PoC, or nucleus templates have been observed. This CVE is not listed in the CISA KEV catalog, indicating that no known active exploitation has been reported to US federal authorities as of the data snapshot.

Report generated by ValtersIT Threat Intelligence. Confidence in vendor attribution: Medium (based on NVD description naming "Autodesk 3ds Max") — although vendor/product fields are listed as "Unknown," the description explicitly states the affected product. Affected version range is unknown; treat all versions as potentially vulnerable until a vendor advisory is issued.