Bottom line: A critical security vulnerability in Adobe’s Chrome extension with over 300 million users enabled unauthorized data access.
The Chrome extension Adobe Acrobat with 312 million active users contained a security vulnerability that allowed attackers to access user data. The vulnerability affected one of the most widespread PDF tools in the browser ecosystem.
The Adobe Acrobat extension for Google Chrome, installed by over 312 million users, contained a vulnerability that enabled attackers to access or exfiltrate data. The gap affected one of the most widely distributed browser extensions for PDF management and editing.
For CISOs and security teams, this represents a significant risk: browser extensions with high user adoption rates are frequently deployed as standard tools in enterprise environments. If such components are vulnerable, it can lead to massive data loss, compliance violations, and abuse of access rights — particularly since PDF documents often contain sensitive or confidential content.
It is recommended to update the extension to the latest patched version and, as part of inventory and risk assessment processes, review the extent to which the extension is deployed in the enterprise environment and whether additional security measures are required.
Source: www.heise.de · Published 24 July 2026
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