---
id: CVE-2026-21281
title: >-
  InCopy versions 21.0, 19.5.5 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
summary: >-
  InCopy versions 21.0, 19.5.5 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…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
  - CWE-787
vendor: adobe
product: incopy
affected:
  - incopy < 20.5.1
  - incopy = 21.0
patched:
  - incopy 20.5.1
published: '2026-01-13'
updated: '2026-08-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21281'
references:
  - url: 'https://helpx.adobe.com/security/products/incopy/apsb26-04.html'
    label: psirt@adobe.com
tags:
  - nvd
epss: 0.00223
epssPercentile: 0.11559
ingestedAt: '2026-08-27T21:08:14.632Z'
---

## Overview

InCopy versions 21.0, 19.5.5 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.

## Affected

- `incopy < 20.5.1`
- `incopy = 21.0`

## Remediation

Upgrade past the affected range:

- `incopy 20.5.1`