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Adobe Releases Urgent Update to Fix Critical Acrobat Vulnerability

4/13/2026

Summary

Story summary

Adobe issued emergency updates for Acrobat Reader to patch CVE-2026-34621, a critical vulnerability (CVSS 8.6) that is actively being exploited.
The flaw lets attackers execute malicious code via crafted PDF files and affects multiple Windows and macOS versions of Acrobat and Reader, including versions prior to 26.001.21411.
Evidence suggests exploitation began in December 2025.
Adobe urges users to update immediately to protect against potential attacks, given the ease of exploitation.

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Story summary

Adobe issued emergency updates for Acrobat Reader to patch CVE-2026-34621, a critical vulnerability (CVSS 8.6) that is actively being exploited.
The flaw lets attackers execute malicious code via crafted PDF files and affects multiple Windows and macOS versions of Acrobat and Reader, including versions prior to 26.001.21411.
Evidence suggests exploitation began in December 2025.
Adobe urges users to update immediately to protect against potential attacks, given the ease of exploitation.