CVE-2026-27216: Adobe Substance 3D Painter Info Disclosure

CVE-2026-27216 Overview

CVE-2026-27216 is an out-of-bounds read vulnerability affecting Adobe Substance 3D Painter versions 11.1.2 and earlier. This memory corruption flaw allows attackers to access sensitive information stored in application memory by tricking users into opening specially crafted malicious files. The vulnerability requires user interaction for successful exploitation.

Critical Impact
Successful exploitation could expose sensitive memory contents, potentially revealing confidential data, cryptographic keys, or other privileged information processed by Substance 3D Painter.

Affected Products

Adobe Substance 3D Painter versions 11.1.2 and earlier
All platforms running vulnerable Substance 3D Painter versions

Discovery Timeline

2026-03-10 - CVE-2026-27216 published to NVD
2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-27216

Vulnerability Analysis

This vulnerability is classified as CWE-125 (Out-of-Bounds Read), a memory corruption flaw where the application reads data beyond the boundaries of an allocated memory buffer. When processing maliciously crafted files, Adobe Substance 3D Painter fails to properly validate buffer boundaries, allowing memory read operations to extend past intended limits.

The out-of-bounds read condition enables attackers to extract sensitive data from adjacent memory regions. While this vulnerability does not directly allow code execution or data modification, the information disclosed could facilitate further attacks or compromise confidential project data being processed by the application.

Root Cause

The vulnerability stems from improper bounds checking during file parsing operations in Adobe Substance 3D Painter. When the application processes certain file structures, it fails to adequately validate the size and offset parameters before performing read operations, allowing memory access beyond allocated buffer boundaries.

Attack Vector

Exploitation requires local access and user interaction—specifically, a victim must be convinced to open a maliciously crafted file. The attack vector is local (AV:L) with low complexity (AC:L), requiring no privileges but necessitating user interaction (UI:R). Successful exploitation impacts confidentiality without affecting integrity or availability of the system.

An attacker would typically distribute the malicious file through social engineering techniques, such as:

Email attachments disguised as legitimate 3D project files
Downloads from compromised or malicious websites
Shared project repositories containing embedded malicious content

Detection Methods for CVE-2026-27216

Indicators of Compromise

Unusual memory access patterns or application crashes in Adobe Substance 3D Painter
Unexpected file access attempts from Substance 3D Painter processes
Suspicious files with unusual structure being opened by the application

Detection Strategies

Monitor for Adobe Substance 3D Painter versions prior to the patched release
Implement file integrity monitoring for project files opened by the application
Deploy endpoint detection rules to identify anomalous memory read patterns

Monitoring Recommendations

Enable application-level logging for file operations in creative software environments
Monitor for unexpected network activity following file operations in Substance 3D Painter
Implement behavioral analysis to detect memory disclosure attempts

How to Mitigate CVE-2026-27216

Immediate Actions Required

Update Adobe Substance 3D Painter to the latest patched version immediately
Avoid opening files from untrusted or unknown sources
Implement email filtering to block potentially malicious attachments targeting creative applications
Educate users about the risks of opening files from unverified sources

Patch Information

Adobe has released a security update addressing this vulnerability. Refer to Adobe Security Bulletin APSB26-25 for detailed patch information and download instructions. Organizations should prioritize applying this update to all systems running affected versions of Substance 3D Painter.

Workarounds

Restrict file access to trusted sources only until patches can be applied
Implement application sandboxing to limit potential impact of exploitation
Use virtual environments for opening files from untrusted sources
Consider temporarily restricting file type associations for Substance 3D Painter project formats

bash

# Verify installed Adobe Substance 3D Painter version
# Check Help > About in the application or verify installation directory
# Ensure version is newer than 11.1.2 after applying the security update