CVE-2026-21287CWE-416

CVE-2026-21287

High · published January 14, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
11.5
In the wild
Unconfirmed
What it is

⚡ A crafty malicious file could give attackers the keys to your castle! The Use After Free vulnerability in Substance3D Stager versions 3.1.5 and earlier allows for arbitrary code execution, but it does require a little nudge from the user. 🔥 Think of it like leaving a fire alarm unplugged in a crowded theater. If someone trips the alarm by opening the wrong door (or file), it could lead to chaos and disaster, putting everyone at risk. If an unsuspecting user opens a malicious file, it could allow attackers to execute arbitrary code within the context of that user's account. This means they could potentially access sensitive data, alter settings, or even install malware—an absolute nightmare!

Put simply

Think of it like leaving a fire alarm unplugged in a crowded theater. If someone trips the alarm by opening the wrong door (or file), it could lead to chaos and disaster, putting everyone at risk. This vulnerability arises from a Use After Free flaw, which means that the program continues to use a piece of memory after it's been freed, enabling attackers to inject their code into that space.

What to do

If an unsuspecting user opens a malicious file, it could allow attackers to execute arbitrary code within the context of that user's account. This means they could potentially access sensitive data, alter settings, or even install malware—an absolute nightmare! Upgrade Substance3D Stager to version 3.1.6 or later immediately to close this vulnerability. Additionally, educate users on the dangers of opening unknown files, and consider implementing stricter security protocols. You've got this! By taking these steps, you’re on your way to becoming a security hero! 🛡️

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00216 · 11.5th percentile
Weakness
CWE-416 · Use After Free
Published
2026-01-14T01:16Z
Affected products (1)
ProductVersionsFixed in
adobe/substance_3d_stager< 3.1.63.1.6
References (1)
EPSS history
Timeline
  • 13 JAN 19:44Z
    Substance3D - Stager | Use After Free (CWE-416)
    cvelistv5