CVE-2026-75749 in Substance 3D Painter
Summary
by MITRE • 08/25/2026
Substance3D - Painter is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. 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 • 08/26/2026
The identified vulnerability within Substance 3D Painter represents a critical security flaw classified as an out-of-bounds write, which falls under the Common Weakness Enumeration category CWE-787. This type of memory corruption error occurs when software writes data to a memory location beyond the intended boundary of a buffer or array structure. In the context of complex digital content creation tools like Substance 3D Painter, such vulnerabilities often arise during the parsing and processing of external asset files. The application must interpret various file formats containing textures, materials, and scene data, requiring robust input validation to ensure that all read operations remain within allocated memory limits. When this validation fails, an attacker can craft a malicious file designed to trigger specific code paths where index calculations or length checks are insufficiently verified against actual buffer sizes.
The operational impact of exploiting this out-of-bounds write is severe, as it directly enables arbitrary code execution in the context of the current user. Unlike read-only vulnerabilities that might only lead to information disclosure, a write operation allows an attacker to overwrite adjacent memory structures such as function pointers, return addresses on the stack, or object vtables. By carefully controlling the data written outside the buffer boundaries, an adversary can manipulate program control flow to execute arbitrary shellcode or inject malicious payloads into the process space. This capability effectively grants full compromise of the application and potentially the underlying operating system if privilege escalation techniques are subsequently applied. The severity is further amplified by the fact that this vulnerability does not require administrative privileges on the target machine, relying instead on the default execution context of a standard user account.
Exploitation of this flaw necessitates social engineering or targeted delivery mechanisms because it requires explicit user interaction. A victim must open a specially crafted malicious file within Substance 3D Painter to trigger the vulnerable code path. This dependency on user action aligns with ATT&CK technique T1204, which covers User Execution, specifically sub-techniques related to opening files or running applications. Attackers may distribute these malicious assets through phishing campaigns, compromised repositories, or deceptive links disguised as legitimate texture packs or project templates. The requirement for interaction means that the vulnerability is not remotely exploitable via network services but remains highly dangerous in collaborative environments where artists frequently share resources and import third-party content without rigorous security vetting.
To mitigate this risk, immediate action should be taken to update Substance 3D Painter to the latest version provided by Adobe, which includes patches for memory safety issues such as out-of-bounds writes. Organizations implementing this software should enforce strict policies regarding the sourcing of digital assets, encouraging the use of trusted repositories and verifying file integrity before import. Additionally, deploying application whitelisting or data execution prevention mechanisms can help limit the impact if an exploit is attempted by restricting where executable code can run within the system memory. Security awareness training for creative professionals is also essential to recognize suspicious files that may contain embedded exploits disguised as standard media assets.