CVE-2026-27273
Published: 10 March 2026
Summary
CVE-2026-27273 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Adobe Substance 3D Stager. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 11.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates the out-of-bounds write vulnerability by requiring timely identification, reporting, and application of vendor patches for Substance3D Stager as detailed in Adobe bulletin APSB26-29.
Implements memory protection safeguards like DEP and ASLR to prevent arbitrary code execution resulting from the out-of-bounds write exploitation.
Deploys malicious code protection mechanisms to scan and block specially crafted malicious files that trigger the vulnerability upon user interaction.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Out-of-bounds write in desktop application enables arbitrary code execution triggered by opening a crafted file, directly mapping to client-side exploitation (T1203) and user execution of a malicious file (T1204.002).
NVD Description
Substance3D - Stager versions 3.1.7 and earlier are 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…
more
open a malicious file.
Deeper analysisAI
CVE-2026-27273 is an out-of-bounds write vulnerability (CWE-787) affecting Adobe Substance3D Stager versions 3.1.7 and earlier. The flaw enables arbitrary code execution in the context of the current user upon processing a malicious file. It carries a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) and was published on 2026-03-10.
Exploitation requires local access and user interaction, as a victim must open a specially crafted malicious file. An unprivileged attacker can leverage this by tricking a user into loading the file, resulting in high-impact compromise of confidentiality, integrity, and availability within the user's session.
Adobe Security Bulletin APSB26-29 provides details on mitigation: https://helpx.adobe.com/security/products/substance3d_stager/apsb26-29.html.
Details
- CWE(s)