CVE-2025-2531: Luxion KeyShot RCE Vulnerability

CVE-2025-2531 Overview

CVE-2025-2531 is a heap-based buffer overflow vulnerability in Luxion KeyShot, a 3D rendering and animation application. The flaw resides in the parser that processes COLLADA Digital Asset Exchange (.dae) files. The parser copies user-supplied data into a heap buffer without validating the source length, enabling memory corruption when KeyShot opens a crafted file.

An attacker who convinces a user to open a malicious .dae file or visit a page that delivers one can execute arbitrary code in the context of the KeyShot process. The vulnerability is tracked by the Zero Day Initiative as ZDI-CAN-23704 and is classified under [CWE-122] (Heap-based Buffer Overflow) and [CWE-787] (Out-of-Bounds Write).

Critical Impact
Successful exploitation grants arbitrary code execution as the current user, allowing attackers to install malware, steal data, or pivot deeper into the host.

Affected Products

Luxion KeyShot (Windows builds processing .dae files)
KeyShot installations that import COLLADA assets via the affected parser
Workstations used by designers, engineers, and 3D artists running vulnerable KeyShot versions

Discovery Timeline

2025-03-25 - CVE-2025-2531 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-2531

Vulnerability Analysis

The vulnerability exists in the routine that parses COLLADA .dae files, an XML-based interchange format used to import 3D scenes into KeyShot. During parsing, the application copies attacker-controlled data from the file into a fixed-size heap allocation without first verifying that the source length fits the destination buffer.

When the supplied data exceeds the buffer size, adjacent heap metadata and objects are overwritten. Attackers can shape the input to corrupt function pointers, virtual table entries, or other control-flow structures reachable from the parser. The result is arbitrary code execution inside the KeyShot process with the privileges of the user opening the file.

Exploitation requires user interaction. The victim must open a malicious .dae file directly or load one delivered through a project archive, asset library, or web download. Because KeyShot frequently runs on workstations used for sensitive intellectual property, code execution in that context can expose proprietary 3D models, customer renders, and credentials cached by the user.

Root Cause

The root cause is missing length validation before a memory copy operation on heap-allocated storage. The parser trusts size fields or element content from the .dae input rather than bounding writes by the destination buffer size, satisfying both [CWE-122] and [CWE-787].

Attack Vector

The attack vector is local and requires user interaction. Delivery channels include phishing emails carrying .dae attachments, malicious asset packs shared on 3D content marketplaces, and compromised supply chain repositories that designers routinely import.

No authentication is required against KeyShot itself; the attacker only needs the target to open the file. The Zero Day Initiative advisory ZDI-25-174 provides additional context on the parsing flow. See the Zero Day Initiative Advisory ZDI-25-174 for vendor coordination details.

No public proof-of-concept exploit is currently listed in the enriched data, and the EPSS percentile remains low, indicating limited observed exploitation activity at this time.

Detection Methods for CVE-2025-2531

Indicators of Compromise

Unexpected child processes spawned by keyshot.exe shortly after opening a .dae file, such as cmd.exe, powershell.exe, or rundll32.exe.
Crash dumps or Windows Error Reporting events naming the KeyShot process with access violations during COLLADA import.
Outbound network connections from the KeyShot process to untrusted domains after loading a 3D asset.
.dae files arriving via email, chat, or shared drives from unverified third parties, especially with unusually large element payloads.

Detection Strategies

Hunt for process lineage where keyshot.exe is the parent of interactive shells, scripting engines, or LOLBins.
Inspect inbound .dae files for malformed COLLADA elements or oversized string attributes inconsistent with legitimate exporters.
Correlate KeyShot crash telemetry with subsequent suspicious binary execution on the same endpoint.

Monitoring Recommendations

Enable command-line and module-load logging on workstations running KeyShot to capture post-exploitation activity.
Forward EDR telemetry from design and engineering endpoints to a centralized data lake for retrospective hunting.
Alert on KeyShot processes initiating network connections outside of license servers and approved update endpoints.

How to Mitigate CVE-2025-2531

Immediate Actions Required

Inventory all hosts running Luxion KeyShot and identify versions in use.
Block inbound .dae files from untrusted sources at email and web gateways until patching is complete.
Instruct users to open 3D assets only from verified internal sources or trusted vendors.
Restrict KeyShot to standard user privileges so successful exploitation does not yield administrator access.

Patch Information

Luxion has coordinated with the Zero Day Initiative on this issue. Administrators should consult the Zero Day Initiative Advisory ZDI-25-174 and Luxion's official release notes for the fixed KeyShot version, then upgrade all installations to that release or later.

Workarounds

Disable or avoid importing .dae files until the patched version is deployed; use alternative formats such as .fbx or .obj from trusted sources where possible.
Open untrusted 3D assets only inside a hardened virtual machine that is isolated from production data and credentials.
Apply application allowlisting to prevent KeyShot from launching unexpected child processes.

bash

# Configuration example: block .dae attachments at an email gateway (illustrative)
# Replace with the syntax used by your mail filter or secure email gateway
attachment.filter.add --extension dae --action quarantine --reason "CVE-2025-2531"