CVE-2026-21321 After Effects | Integer Overflow or Wraparound (CWE-190)
An integer overflow in Adobe After Effects allows arbitrary code execution if a user opens a malicious file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21321?
CVE-2026-21321 is a high-severity vulnerability in Adobe After Effects, published on 10 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2026-21321?
It affects 1 product.
Products include Adobe After Effects.
How do I fix CVE-2026-21321?
No fix has been published for CVE-2026-21321 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21321 being exploited?
There is no known exploitation of CVE-2026-21321 in the wild and no public exploit code.
Other vulnerabilities in Adobe After Effects
- CVE-2020-3765 Memory corruption in Adobe After Effects
- CVE-2021-28586 Adobe After Effects PDF file parsing out-of-bounds write could lead to remote code execution vulnerability
- CVE-2021-28571 Adobe After Effects improper neutralization of special elements could lead to remote code execution
- CVE-2021-28570 Adobe After Effects uncontrolled search path element vulnerability could lead to remote code execution
- CVE-2026-48274 After Effects | Out-of-bounds Write (CWE-787)
Sources
Also known as GHSA-4g5r-whcx-rjr9.