How severe is CVE-2026-21334?

CVE-2026-21334 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21334 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21334?

CVE-2026-21334 affects Adobe Substance 3d Designer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21334?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21334 have an EU (EUVD) identifier?

Yes. CVE-2026-21334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6385.

When was CVE-2026-21334 published?

CVE-2026-21334 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-21334

CVE-2026-21334 is a high-severity vulnerability in Adobe Substance 3d Designer with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6385
Weakness: CWE-787
Affected product: Adobe Substance 3d Designer
Published: 2026-02-10
Last modified: 2026-06-17

Description

Substance3D - Designer versions 15.1.0 and earlier are affected by an out-of-bounds write 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.

Frequently asked questions

What is CVE-2026-21334?: Substance3D - Designer versions 15.1.0 and earlier are affected by an out-of-bounds write 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.
How severe is CVE-2026-21334?: CVE-2026-21334 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21334 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21334?: CVE-2026-21334 affects Adobe Substance 3d Designer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21334?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21334 have an EU (EUVD) identifier?: Yes. CVE-2026-21334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6385.
When was CVE-2026-21334 published?: CVE-2026-21334 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/substance3d_designer/apsb26-19.html

Affected products (1)

cpe:2.3:a:adobe:substance_3d_designer:*:*:*:*:*:*:*:*

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