CVE-2026-21278 InDesign Desktop | Out-of-bounds Read (CWE-125)
An attacker can access sensitive memory information by tricking a user into opening a malicious file in Adobe InDesign Desktop.
- 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-2026-21278?
CVE-2026-21278 is a medium-severity vulnerability in Adobe Indesign, published on 13 Jan 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
InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Out-of-bounds Read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to access sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Weakness: CWE-125
Which versions are affected by CVE-2026-21278?
It affects 1 product.
Products include Adobe Indesign.
How do I fix CVE-2026-21278?
No fix has been published for CVE-2026-21278 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21278 being exploited?
There is no known exploitation of CVE-2026-21278 in the wild and no public exploit code.
Other vulnerabilities in Adobe Indesign
- CVE-2019-7107 Code injection in InDesign
- CVE-2017-11302 Memory corruption in Adobe InDesign 12.1.0 and earlier versions
- CVE-2016-7886 Memory corruption in Adobe InDesign 11.4.1 and earlier, InDesign Server 11.0.0 and earlier
- CVE-2021-36004 Adobe InDesign CoolType out of bounds write vulnerability could lead to arbitrary stack manipulation
- CVE-2021-21098 Adobe InDesign PCX file parsing out-of-bounds write vulnerability could lead to remote code execution
Sources
Also known as GHSA-93jc-mx98-cgc8.