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CVE-2026-27274 is a high-severity vulnerability affecting Adobe Substance 3D Stager versions 3.1.7 and earlier. This flaw is classified as an out-of-bounds write condition. The vulnerability exists within the software’s parsing logic when handling crafted .stg file formats or embedded assets. When a user opens a malicious file, the application fails to properly validate specific object properties, allowing an attacker to write data beyond the boundaries of an allocated buffer. This memory corruption can be leveraged to overwrite adjacent memory structures, including function pointers or return addresses. By carefully controlling the overwritten data, a remote attacker can achieve arbitrary code execution. This execution occurs within the security context of the currently logged-in user, meaning a successful compromise could lead to full system takeover at the user privilege level if the user has administrative rights. The attack vector is local, requiring the victim to physically open the file, which makes user interaction the primary exploitation prerequisite .
dailycve form:
Platform: Substance 3D Stager
Version: 3.1.7 and earlier
Vulnerability: Out-of-bounds Write
Severity: HIGH (CVSS 7.8)
date: March 10, 2026
Prediction: Patched March 2026
What Undercode Say:
Analytics:
The vulnerability was disclosed as part of Adobe’s March 2026 Patch Tuesday release, which addressed a total of 80 CVEs across multiple products .
Substance 3D Stager specifically received patches for six Critical bugs in March, all capable of leading to arbitrary code execution .
This follows a trend where Adobe’s creative suite, particularly Substance 3D products, has been a frequent target for memory corruption flaws in early 2026 .
The attack complexity is low, and while it requires user interaction, the preview pane in file explorers can sometimes trigger these vulnerabilities without a full file open .
Exploit:
This is a conceptual representation of an out-of-bounds write trigger.
An attacker crafts a malicious .stg file with a specifically corrupted header.
The following is a mock bash command to simulate the corruption of a file structure.
It does not represent actual exploitation code but the logic of data manipulation.
Example: Creating a malformed chunk using printf to simulate header corruption.
The application reads the "size" field (0xFFFFFFFF) and allocates a buffer of 256 bytes.
The subsequent data copy (0x41414141...) exceeds the buffer boundary.
printf '\x7B\x00\x00\x00\xFF\xFF\xFF\xFF\x7D\x00\x00\x00\x41%.0s' {1..1024} > exploit.stg
Detection command to find vulnerable versions on a system (Windows Example using PowerShell via bash emulation).
This checks the file version of the core executable.
pwsh -c "Get-Item 'C:\Program Files\Adobe\Adobe Substance 3D Stager\Substance 3D Stager.exe' | Select-Object -ExpandProperty VersionInfo | Select-Object FileVersion"
Protection from this CVE:
- Update Adobe Substance 3D Stager to version 3.2.0 or later via the Creative Cloud desktop application.
- Enable Adobe’s “Protected Mode” or “Sandbox” features within the application preferences to limit the impact of memory corruption exploits.
- Avoid opening .stg or related asset files from untrusted or unknown sources.
- Implement application whitelisting to prevent unauthorized executables launched by the exploited process from running.
Impact:
Successful exploitation grants the attacker the same user rights as the logged-in user. If that user has administrative privileges, the attacker gains full control of the machine, including the ability to install malware, create new users, and access sensitive data. Given the high prevalence of critical-rated code execution bugs in Adobe’s February and March updates , this vulnerability represents a significant risk to digital artists and design agencies using the Substance 3D workflow.
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Sources:
Reported By: nvd.nist.gov
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