CVE-2026-21304CWE-122CWE-787

CVE-2026-21304

High · published January 14, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
19.4
In the wild
Unconfirmed
What it is

⚡ A simple click could unleash chaos! Opening a malicious InDesign file could trigger a Heap-based Buffer Overflow, leading to arbitrary code execution with your current user privileges. 😱 Think of this as a sneaky package arriving at your doorstep — when you open it, it spills out chaos into your home without you realizing until it’s too late! Just like you wouldn’t want to open a suspicious package, you shouldn't open unknown files. If an attacker crafts a malicious file and you open it, they could execute any code they desire. This means they could potentially manipulate your system, steal data, or wreak havoc, all while appearing as you! Protecting your workspace is crucial, and this vulnerability is a significant risk.

Put simply

Think of this as a sneaky package arriving at your doorstep — when you open it, it spills out chaos into your home without you realizing until it’s too late! Just like you wouldn’t want to open a suspicious package, you shouldn't open unknown files. This Heap-based Buffer Overflow in InDesign Desktop versions 21.0 and 19.5.5 (and earlier) allows for arbitrary code execution if a user opens a specially crafted file, resulting in potential system compromise under the current user's privileges.

What to do

If an attacker crafts a malicious file and you open it, they could execute any code they desire. This means they could potentially manipulate your system, steal data, or wreak havoc, all while appearing as you! Protecting your workspace is crucial, and this vulnerability is a significant risk. To remediate this, ensure you're running the latest version of InDesign. Update to version 21.1 or later immediately. Additionally, educate users to avoid opening files from unknown sources. You've got this! By staying vigilant and updating, you can keep your system safe from these threats. 🛡️

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00280 · 19.4th percentile
Weaknesses
CWE-122 · Heap-based Buffer Overflow; CWE-787 · Out-of-bounds Write
Published
2026-01-14T00:16Z
Affected products (2)
ProductVersionsFixed in
adobe/indesign< 20.5.120.5.1
adobe/indesign≥ 21.0, < 21.121.1
References (1)
EPSS history
Timeline
  • 13 JAN 18:35Z
    InDesign Desktop | Heap-based Buffer Overflow (CWE-122)
    cvelistv5