CVE-2026-21358
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
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 requires user interaction – the victim must open a malicious file.
Risk Assessment
The risk involves potential application crashes, which could lead to downtime and disruption of organizational operations.
Recommendation
It is recommended to update InDesign Desktop to the latest version with the fix. Also, avoid opening files from untrusted sources.
Other vulnerabilities in InDesign Desktop
See all- CVE-2026-48293High
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by an out-of-bounds write vulnerability that could lead to arbitrary code execution in the context of the current user. User interaction is required (opening a malicious file).
- CVE-2026-34702High
Stack-based buffer overflow vulnerability in InDesign Desktop versions 21.3, 20.5.3 and earlier. Could lead to arbitrary code execution in the context of the current user after opening a malicious file.
- CVE-2026-34701High
A heap-based buffer overflow vulnerability in InDesign Desktop allows remote code execution in the context of the current user. User interaction is required to open a malicious file.
- CVE-2026-34700High
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by an out-of-bounds write vulnerability that could lead to arbitrary code execution in the context of the current user. User interaction is required (opening a malicious file).
- CVE-2026-34699High
A heap-based buffer overflow vulnerability in InDesign Desktop allows remote code execution in the context of the current user. User interaction is required to open a malicious file.
- CVE-2026-34698High
A heap-based buffer overflow vulnerability in InDesign Desktop allows remote code execution in the context of the current user. User interaction is required to open a malicious file.
- CVE-2026-34697High
A stack-based buffer overflow vulnerability in InDesign Desktop allows remote code execution in the context of the current user. User interaction is required to open a malicious file.
- CVE-2026-34696High
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a Use After Free vulnerability. This could allow arbitrary code execution in the context of the current user after opening a malicious file.
- CVE-2026-34695High
A stack-based buffer overflow vulnerability in InDesign Desktop allows remote code execution in the context of the current user. User interaction is required to open a malicious file.
- CVE-2026-27286Medium
InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to disclose sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Original NVD description (English source)
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.