1. Home
  2. CVE Database
  3. CVE-2026-21358
MEDIUM · 5.5

CVE-2026-21358

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 vulnera...

Vulnerability 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.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
AdobeIndesign< 20.5.2
AppleMacos-
MicrosoftWindows-

Related Weaknesses (CWE)

CWE-122CWE-787

References

FAQ

What is CVE-2026-21358?

CVE-2026-21358 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 vulnera...

How severe is CVE-2026-21358?

CVE-2026-21358 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-21358?

Check the references section above for vendor advisories and patch information. Affected products include: Adobe Indesign, Apple Macos, Microsoft Windows.