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CVE-2026-27273 is a high-severity vulnerability affecting Adobe Substance 3D Stager versions 3.1.7 and earlier . The flaw is classified as an out-of-bounds write (CWE-787), which occurs when the software writes data beyond the allocated boundary of a buffer . This specific issue resides within the application’s file parsing routines; when a user opens a specially crafted malicious file, the application fails to properly validate the input data . This lack of validation causes the software to write past the end of the intended buffer, leading to memory corruption. An attacker can leverage this memory corruption to overwrite critical data structures, such as function pointers or return addresses, within the application’s memory space . This manipulation allows the attacker to redirect the program’s execution flow. Consequently, the attacker can achieve arbitrary code execution, running malicious code with the same privileges as the currently logged-in user . If the user has administrative rights, this could lead to a full system compromise. The attack vector is local, meaning the attacker must have the ability to deliver the malicious file to the target system and convince the user to open it .
dailycve form:
Platform: Adobe Substance3D Stager
Version: 3.1.7 and earlier
Vulnerability : Out-of-bounds write
Severity: High (7.8)
date: March 11, 2026
Prediction: Patch within 24h
What Undercode Say:
Analytics:
The vulnerability has a CVSS v3.1 base score of 7.8, with a vector string of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H . This indicates a local attack vector, low attack complexity, no privileges required, but user interaction is mandatory . The impact on confidentiality, integrity, and availability is high . According to SSVC analysis, exploitation is not currently automated, and the technical impact is considered total . As of March 11, 2026, there are no reports of active exploitation in the wild .
Exploit:
The exploit would involve crafting a malicious file that, when parsed by the vulnerable Substance 3D Stager engine, triggers the out-of-bounds write.
1. Attack Vector: A attacker creates a booby-trapped `.stage` file or another supported 3D asset format.
2. Delivery: The file is distributed via phishing emails, malicious websites, or file-sharing services.
3. Trigger: Upon the victim opening the file in Substance 3D Stager, the vulnerable parser writes outside the buffer.
4. Code Execution: The attacker overwrites a critical memory structure to execute shellcode, installing malware or ransomware.
No public proof-of-concept code is available at the time of writing.
Protection from this CVE:
- Patch Immediately: Update to Substance 3D Stager version 3.1.8 or later via the Adobe Creative Cloud desktop application .
- User Education: Train users to avoid opening files from untrusted or unknown sources .
- Principle of Least Privilege: Ensure users operate with minimal necessary rights to limit the impact of code execution .
- Endpoint Security: Employ updated antivirus and endpoint detection solutions to identify malicious files.
- Application Isolation: Consider using application sandboxing or containment policies.
Impact:
Successful exploitation allows an attacker to execute arbitrary code within the context of the current user . This could lead to:
– Confidentiality Breach: Unauthorized access and exfiltration of sensitive data stored on the compromised machine .
– Integrity Violation: Modification or deletion of critical files and system configurations .
– Availability Loss: Application crashes or system instability, potentially leading to denial of service .
– Privilege Escalation: If the target user has administrative privileges, the attacker can take full control of the operating system, establishing persistence and moving laterally within the network .
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Sources:
Reported By: nvd.nist.gov
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