CVE-2026-103850 in Substance 3D Stager
Summary
by MITRE • 10/15/2026
Substance3D - Stager 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 Substance3D Stager represents a critical security flaw classified as an out-of-bounds read, which falls under the Common Weakness Enumeration category CWE-125. This type of memory safety error occurs when software attempts to access data at a memory location that is outside the intended boundaries of the allocated buffer. In the context of Substance3D Stager, this defect allows for the unauthorized disclosure of sensitive information residing in adjacent memory regions. The technical mechanism involves the application failing to properly validate input parameters or array indices before performing read operations, thereby permitting access to memory contents that were not explicitly intended for exposure. This lack of rigorous boundary checking is a fundamental programming error often associated with legacy codebases or complex parsing logic where edge cases are insufficiently handled during data ingestion processes.
From an operational perspective, the exploitation of this vulnerability requires direct user interaction, specifically necessitating that a victim opens a malicious file crafted to trigger the erroneous memory access sequence. This dependency on user action classifies the attack vector as local with high complexity or potentially remote if delivered via phishing mechanisms where social engineering is employed to compel the opening of the payload. Once triggered, the vulnerability enables an attacker to read arbitrary memory contents, which may include sensitive data such as authentication tokens, cryptographic keys, personally identifiable information, or internal application states that are not meant for external consumption. The impact extends beyond simple data leakage; it can facilitate further attacks by providing attackers with contextual intelligence about the target environment, potentially leading to privilege escalation or more sophisticated exploitation chains if combined with other vulnerabilities in the system stack.
This vulnerability aligns closely with ATT&CK technique T1005, which refers to Data from Local System, as it involves extracting information directly from the memory of a running process without necessarily modifying files on disk. The absence of proper input validation and bounds checking highlights deficiencies in secure coding practices related to buffer management. To mitigate this risk, developers must implement strict input sanitization routines that verify all indices and lengths against allocated buffer sizes before any read operation is executed. Additionally, employing memory-safe programming languages or utilizing static analysis tools during the development lifecycle can help identify such out-of-bounds conditions early. For end-users, mitigation involves maintaining updated versions of Substance3D Stager where this flaw has been patched by Adobe through security updates and exercising caution when opening files from untrusted sources to prevent triggering the malicious code path that exploits this memory disclosure vulnerability.