Adobe InDesign Desktop up to 20.5.3/21.3 File heap-based overflow

Summaryinfo

A vulnerability marked as critical has been reported in Adobe InDesign Desktop up to 20.5.3/21.3. This impacts an unknown function of the component File Handler. Performing a manipulation results in heap-based overflow. This vulnerability is reported as CVE-2026-34698. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Adobe InDesign Desktop up to 20.5.3/21.3. It has been classified as critical. This affects an unknown code of the component File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in 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.

It is possible to read the advisory at helpx.adobe.com. This vulnerability is uniquely identified as CVE-2026-34698 since 03/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/09/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Image Processing Software

Vendor

• Adobe

Name

• InDesign Desktop

Version

• 20.5.0
• 20.5.1
• 20.5.2
• 20.5.3
• 21.0
• 21.1
• 21.2
• 21.3

License

• commercial

Website

• Vendor: https://www.adobe.com/

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