Zscaler protects against 3 new vulnerabilities for Adobe Acrobat and Reader

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 3 vulnerabilities included in the March 2026 Adobe security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the March release and deploy additional protections, as necessary.

APSB26-26 – Security updates available for Adobe Acrobat and Reader.

Adobe has released security updates for Adobe Acrobat and Reader for Windows and macOS. These updates address critical and important vulnerabilities. Successful exploitation could lead to arbitrary code execution and privilege escalation. 

Affected Software

• Acrobat DC Continuous 25.001.21265 and earlier versions for Windows & macOS
• Acrobat Reader DC Continuous 25.001.21265 and earlier versions for Windows & macOS
• Acrobat 2024 Classic 2024 24.001.30307 and earlier versions for Windows & 24.001.30308 and earlier for macOS

CVE-2026-27220 – Use After Free vulnerability leading to Arbitrary code execution. 

Severity: Critical

Subscription Required

• Advanced Threat Protection 

CVE-2026-27278 – Use After Free vulnerability leading to Arbitrary code execution. 

Severity: Critical

Subscription Required

• Advanced Threat Protection 

CVE-2026-27221 – Improper Verification of Cryptographic Signature vulnerability leading to privilege escalation. 

Severity: Important

Subscription Required

• Advanced Threat Protection