High severity · published Oct 13, 2026
CVE-2026-103840
Substance3D - Stager | Out-of-bounds Read (CWE-125)
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Adobe Substance 3D Stager · Adobe
through 3.1.8 · source: vendor
S3
Substance 3d Stager · Adobe
through 3.1.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103840
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103840
vendor-advisory
https://www.adobe.com/trust/security/products/substance3d-stager/apsb26-170.html
More from Adobe Substance 3D Stager
7.8
CVE-2026-103832
Substance3D - Stager | Out-of-bounds Write (CWE-787)
7.8
CVE-2026-103842
Substance3D - Stager | Out-of-bounds Read (CWE-125)
7.8
CVE-2026-103836
Substance3D - Stager | Out-of-bounds Write (CWE-787)
7.8
CVE-2026-103835
Substance3D - Stager | Out-of-bounds Write (CWE-787)
7.8
CVE-2026-103837
Substance3D - Stager | Out-of-bounds Write (CWE-787)
