Adobe Substance3D Stager up to 3.1.6 File Parser out-of-bounds

Summaryinfo

A vulnerability categorized as critical has been discovered in Adobe Substance3D Stager up to 3.1.6. Affected by this issue is some unknown functionality of the component File Parser. Executing a manipulation can lead to out-of-bounds. This vulnerability is handled as CVE-2026-21344. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Adobe Substance3D Stager up to 3.1.6. It has been declared as critical. This vulnerability affects an unknown functionality of the component File Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Substance3D - Stager versions 3.1.6 and earlier are 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.

The advisory is available at helpx.adobe.com. This vulnerability was named CVE-2026-21344 since 12/12/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 298882 (Adobe Substance 3D Stager < 3.1.7 Multiple Vulnerabilities (APSB26-20)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (298882). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Adobe

Name

• Substance3D Stager

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6

License

• commercial

Website

• Vendor: https://www.adobe.com/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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