---
id: "CVE-2009-0927"
kind: "vulnerability"
aliases: ["CVE-2009-0927"]
title: "Adobe Reader and Acrobat: Adobe Reader and Adobe Acrobat Stack-Based Buffer Overflow Vulnerability"
severity: "critical"
cvss: 9.3
epss: 0.96632
exploited: true
status: "open"
category: "package"
products: [{"name": "Adobe Reader and Acrobat", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["acrobat", "adobe-reader", "desktop", "exploited", "macos", "package", "windows"]
not_affected_if: ["non-adobe-pdf-viewer", "not-installed"]
published_at: "2009-03-19T10:30:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2009-0927", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2009-0927", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-0927", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Adobe Reader and Acrobat: Adobe Reader and Adobe Acrobat Stack-Based Buffer Overflow Vulnerability

Adobe Reader and Acrobat have a stack-based buffer overflow that lets a remote attacker run arbitrary code. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Adobe Reader and Acrobat affected ? fixed ?

## How to check

Open Adobe Reader or Acrobat, go to Help > About to read the installed version. unknown for the exact vulnerable version range.

## Fix

Update Adobe Reader or Acrobat to the latest version per Adobe's vendor instructions. unknown for the specific fixed version.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2009-0927
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2009-0927
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2009-0927

## From the sources

Stack-based buffer overflow in Adobe Reader and Adobe Acrobat 9 before 9.1, 8 before 8.1.3 , and 7 before 7.1.1 allows remote attackers to execute arbitrary code via a crafted argument to the getIcon method of a Collab object, a different vulnerability than CVE-2009-0658.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_