Adobe Acrobat security advisory (AV26-340) – Update 1

Serial number: AV26-340
Date: April 13, 2026

On April 12, 2026, Adobe published a security advisory to address a critical vulnerability in the following products:

• Acrobat Mac – versions prior to 24.001.30360
• Acrobat Windows – versions prior to 24.001.30362
• Acrobat DC – versions prior to 26.001.21411
• Acrobat Reader DC – versions prior to 26.001.21411

Adobe is aware of CVE-2026-34621 being exploited in the wild.

Update 1

On April 13, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-34621 to their Known Exploited Vulnerabilities (KEV) Database.

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• Security update available for Adobe Acrobat Reader - APSB26-43
• Adobe Security Advisories
• CISA KEV: CVE-2026-34621