CVE-2026-103822 in Substance 3D Designer
Summary
by MITRE • 10/15/2026
Substance3D - Designer is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 10/15/2026
The identified vulnerability within Adobe Substance 3D Designer represents a critical security flaw classified as an out-of-bounds read, which falls under the Common Weakness Enumeration category CWE-125. This specific type of memory safety error occurs when software attempts to access data at a memory location that lies outside the intended buffer boundaries. In this context, the vulnerability is triggered specifically during the parsing and processing of external files loaded into the application environment. The root cause typically stems from insufficient validation checks on input parameters or file structures before they are processed by internal rendering engines or asset managers. When an attacker crafts a malicious file with specially constructed headers or data payloads that exceed expected limits, the application fails to properly bound-check these inputs, leading it to read memory addresses adjacent to the intended buffer space rather than stopping at the allocated limit.
The operational impact of this vulnerability is primarily centered on information disclosure and potential system compromise through sensitive memory leakage. By exploiting this out-of-bounds read condition, an attacker can force the application to dump contents from arbitrary locations in the process's virtual address space into a location controlled by the attacker or visible within the application interface. This disclosed data may include cryptographic keys, session tokens, passwords stored in memory, internal pointers that aid further exploitation such as bypassing Address Space Layout Randomization (ASLR), and other proprietary algorithmic details embedded within the software binaries. The leakage of such sensitive information can facilitate secondary attacks where an adversary uses the leaked memory contents to reverse-engineer security mechanisms or escalate privileges on the victim's system.
From a threat actor perspective, this vulnerability aligns with techniques observed in advanced persistent threats that rely on social engineering and file-based delivery methods. According to the MITRE ATT&CK framework, this scenario corresponds closely to Tactic TA0002 Execution and potentially Tactic TA0005 Defense Evasion if used for obfuscation or bypassing security controls through memory manipulation. Specifically, it relates to techniques involving local input processing where user interaction is a prerequisite for exploitation. The requirement that a victim must open a malicious file places this vulnerability within the realm of client-side attacks rather than remote code execution via network services alone. Attackers would likely distribute these crafted files through phishing campaigns, compromised legitimate software repositories, or social engineering tactics designed to trick users into opening seemingly benign 3D asset files.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term defensive posture improvements. The most effective mitigation is the prompt application of vendor-provided patches that correct the buffer boundary checks within the file parsing logic. Organizations should ensure their Adobe Substance 3D Designer installations are updated to the latest stable version where these memory safety issues have been resolved. In environments where immediate patching is not feasible, network segmentation can help isolate workstations running this software from sensitive internal resources, reducing the blast radius if an exploit occurs. Additionally, implementing application whitelisting or strict file execution policies can prevent unauthorized scripts or macros often associated with delivering such malicious files from executing. Security awareness training for users is also critical to reduce the likelihood of successful social engineering attempts that lead to opening untrusted 3D asset files.