Adobe InCopy 21.3 Buffer Overflow via Malicious File (Arbitrary Code Exec)
CVE-2026-34708 Published on June 9, 2026

InCopy | Stack-based Buffer Overflow (CWE-121)
InCopy versions 21.3, 20.5.3 and earlier are affected by a Stack-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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-34708 is exploitable with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Stack Overflow Vulnerability?

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

CVE-2026-34708 has been classified to as a Stack Overflow vulnerability or weakness.


Products Associated with CVE-2026-34708

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Adobe Incopy
 

Affected Versions

Adobe InCopy: