---
title: "Adobe patches Acrobat zero-day that hackers exploited for months"
description: "Opening a malicious PDF could give attackers full control of a computer. Update Acrobat and Reader now."
url: https://kurddevelopers.com/en/news/adobe-acrobat-pdf-zero-day-fix
language: en # English
type: news
published: 2026-04-14T14:35:00.000Z
updated: 2026-11-02T03:10:48.000Z
author: "Osamah Ismail"
author_url: https://kurddevelopers.com/en/author/1
section: "Security"
tags: ["Adobe","Acrobat","PDF","zero-day","security"]
sources: ["Adobe Security Bulletin","TechCrunch","EXPMON"]
image: https://kurddevelopers.com/uploads/2026/11/aiassistant-1440x810-1x-61b51fa3.jpg
translations:
  ku: https://kurddevelopers.com/news/adobe-acrobat-pdf-zero-day-fix
  ar: https://kurddevelopers.com/ar/news/adobe-acrobat-pdf-zero-day-fix
publisher: Kurd Developers
publisher_url: https://kurddevelopers.com/
---

# Adobe patches Acrobat zero-day that hackers exploited for months

> Opening a malicious PDF could give attackers full control of a computer. Update Acrobat and Reader now.

![Image: Adobe](https://kurddevelopers.com/uploads/2026/11/aiassistant-1440x810-1x-61b51fa3.jpg)

## What happened
Adobe fixed a serious security flaw tracked as **CVE-2026-34621**. Hackers had been exploiting it for **at least four months**.

## Who is affected
- **Acrobat DC**, **Reader DC** and **Acrobat 2024**.
- On both Windows and macOS.
- Attacks work by tricking users into opening a **malicious PDF**.

## How it was found
Researcher **Haifei Li** of EXPMON found it after a malicious PDF was uploaded to his scanner. Another copy first appeared on VirusTotal in late November 2025.

According to his analysis, the exploit "could lead to full control of the victim's system."

It's still unknown how many people were affected or who was behind the attacks.

## What to do
Open Acrobat or Reader → Help → Check for Updates. And don't open PDFs from unknown sources.

**Sources:** Adobe Security Bulletin, TechCrunch, EXPMON

---

Published by [Kurd Developers](https://kurddevelopers.com/) on 2026-04-14. Cite as: “Adobe patches Acrobat zero-day that hackers exploited for months”, Kurd Developers, https://kurddevelopers.com/en/news/adobe-acrobat-pdf-zero-day-fix