CVE-2026-34708
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Stack-based Buffer Overflow in Adobe InCopy

Vulnerability report for CVE-2026-34708, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-06-09

Last updated on: 2026-06-10

Assigner: Adobe Systems Incorporated

Description

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.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-06-09
Last Modified
2026-06-10
Generated
2026-06-30
AI Q&A
2026-06-09
EPSS Evaluated
2026-06-28
NVD
EUVD

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
adobe incopy to 20.5.4 (exc)
adobe incopy From 21.0 (inc) to 21.4 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 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).

Attack-Flow Graph

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Executive Summary

This vulnerability is a Stack-based Buffer Overflow found in Adobe InCopy versions 21.3, 20.5.3, and earlier. It occurs when a specially crafted malicious file is opened by a user, which can cause the program to overwrite parts of memory on the stack.

Exploitation of this vulnerability requires user interaction, meaning the victim must open a malicious file for the attack to succeed.

If successfully exploited, it could allow an attacker to execute arbitrary code with the privileges of the current user.

Impact Analysis

This vulnerability can have serious impacts including the potential for an attacker to execute arbitrary code on your system.

Since the code execution happens in the context of the current user, the attacker could gain the same level of access as that user, which might include access to sensitive data or the ability to install malware.

However, exploitation requires that the user opens a malicious file, so user caution and awareness are important mitigating factors.

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