CVE-2026-21358 InDesign Desktop | Heap-based Buffer Overflow (CWE-122)

What is CVE-2026-21358?

CVE-2026-21358 is a medium-severity memory corruption vulnerability in Adobe Indesign, 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

InDesign Desktop versions 21.1, 20.5.1 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in application denial-of-service. An attacker could exploit this vulnerability to crash the application, causing disruption to services. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Weakness: CWE-787, CWE-122

Which versions are affected by CVE-2026-21358?

It affects 1 product.

Products include Adobe Indesign.

How do I fix CVE-2026-21358?

No fix has been published for CVE-2026-21358 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-2026-21358 being exploited?

There is no known exploitation of CVE-2026-21358 in the wild and no public exploit code.

Other vulnerabilities in Adobe Indesign

• CVE-2019-7107 Code injection in InDesign Critical 9.8
• CVE-2017-11302 Memory corruption in Adobe InDesign 12.1.0 and earlier versions Critical 9.8
• CVE-2016-7886 Memory corruption in Adobe InDesign 11.4.1 and earlier, InDesign Server 11.0.0 and earlier Critical 9.8
• CVE-2021-36004 Adobe InDesign CoolType out of bounds write vulnerability could lead to arbitrary stack manipulation High 8.8
• CVE-2021-21098 Adobe InDesign PCX file parsing out-of-bounds write vulnerability could lead to remote code execution High 8.8

All Adobe Indesign vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f3pj-ph83-hp25.