What is CVE-2026-21321?

CVE-2026-21321 is a high-severity vulnerability in Adobe After Effects, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-02-10.

How severe is CVE-2026-21321?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Adobe After Effects

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…

Vulnerability class: Integer Overflow

EPSS: 0.000 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Adobe After Effects — versions 0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

helpx.adobe.com/security/products/after_effects/apsb26-15.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-21321?: CVE-2026-21321 is a high-severity vulnerability in Adobe After Effects, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-02-10.
How severe is CVE-2026-21321?: High severity. CVSS v3 base score is 7.8 out of 10.