How severe is CVE-2026-21321?

CVE-2026-21321 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-2026-21321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21321?

CVE-2026-21321 affects Adobe After Effects. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21321?

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-2026-21321 have an EU (EUVD) identifier?

Yes. CVE-2026-21321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6379.

When was CVE-2026-21321 published?

CVE-2026-21321 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-21321

CVE-2026-21321 is a high-severity vulnerability in Adobe After Effects 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-190.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6379
Weakness: CWE-190
Affected product: Adobe After Effects
Published: 2026-02-10
Last modified: 2026-06-17

Description

After Effects versions 25.6 and earlier are affected by an Integer Overflow or Wraparound 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-2026-21321?: After Effects versions 25.6 and earlier are affected by an Integer Overflow or Wraparound 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-2026-21321?: CVE-2026-21321 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-2026-21321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21321?: CVE-2026-21321 affects Adobe After Effects. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21321?: 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-2026-21321 have an EU (EUVD) identifier?: Yes. CVE-2026-21321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6379.
When was CVE-2026-21321 published?: CVE-2026-21321 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/after_effects/apsb26-15.html

Affected products (1)

cpe:2.3:a:adobe:after_effects:*:*:*:*:*:*:*:*

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