CVE-2021-21067 Adobe Photoshop CoolType arbitrary stack manipulation in Type 1/Multiple Master

High 7.8 Published 12 Mar 2021 Updated 23 Apr 2025

An attacker can achieve arbitrary code execution by tricking a user into opening a malicious file in Adobe Photoshop.

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-2021-21067?

CVE-2021-21067 is a high-severity memory corruption vulnerability in Adobe Photoshop, published on 12 Mar 2021. 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

Adobe Photoshop versions 21.2.5 (and earlier) and 22.2 (and earlier) are affected by an Out-of-bounds Write vulnerability in the CoolType library. An unauthenticated attacker could leverage this vulnerability to achieve 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-787

Which versions are affected by CVE-2021-21067?

It affects 1 product.

Products include Adobe Photoshop 2020.

How do I fix CVE-2021-21067?

No fix has been published for CVE-2021-21067 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-21067 being exploited?

There is no known exploitation of CVE-2021-21067 in the wild and no public exploit code.

Sources

Also known as GHSA-qw4c-4mx7-r5px.