Out-of-bounds Read in Adobe Substance 3d Stager
CVE-2026-103840
Substance3D - Stager is affected by an out-of-bounds read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.adobe.com/trust/security/products/substance3d-stager/apsb26-170.html (vendor-advisory)
Frequently asked questions
- What is CVE-2026-103840?
- CVE-2026-103840 is a high-severity vulnerability in Adobe Substance 3d Stager, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-10-13.
- How severe is CVE-2026-103840?
- High severity. CVSS v3 base score is 7.8 out of 10.