PatchTheCVECVE-2026-27309: Substance3D - Stager versions 3.1.7 and earlier are affected by a Use After Free vulnerability that could resu
CVE-2026-27309 is a high-severity flaw (CVSS 7.8) affecting substance 3d stager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Substance3D - Stager versions 3.1.7 and earlier are affected by a Use After Free 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 open a malicious file.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 87%) |
| CISA exploited list | No |
| Weakness | CWE-416 |
| Published | 2026-03-27 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-27309?
substance 3d stager: upgrade to 3.1.8. Exact commands for each OS are on this page.
Is CVE-2026-27309 being exploited?
CVE-2026-27309 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-27309 affect?
CVE-2026-27309 affects substance 3d stager. Severity is high (CVSS 7.8). Substance3D - Stager versions 3.1.7 and earlier are affected by a Use After Free 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
How urgent is CVE-2026-27309?
Priority 31/100. High severity
Related CVEs
- CVE-2026-103843 HIGH 7.8 UPGRADE Substance3D - Stager is affected by a Use After Free vulnerability that could result in arbitrary code executi
- CVE-2026-103842 HIGH 7.8 UPGRADE Substance3D - Stager is affected by an out-of-bounds read vulnerability when parsing a crafted file, which cou
- CVE-2026-103841 HIGH 7.8 UPGRADE Substance3D - Stager is affected by an out-of-bounds read vulnerability when parsing a crafted file, which cou
- CVE-2026-103840 HIGH 7.8 UPGRADE Substance3D - Stager is affected by an out-of-bounds read vulnerability when parsing a crafted file, which cou
- CVE-2026-103839 HIGH 7.8 UPGRADE Substance3D - Stager is affected by an out-of-bounds write vulnerability that could result in arbitrary code e