securityBACKGROUND
Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025
BACKGROUND
1 SIGNALFIRST DETECTED 9 April 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
9 Apr
Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025
REPORT · HOW · The Hacker News
8.2
Other feeds and industry voices
13 Apr
Adobe rolls out emergency fix for Acrobat, Reader zero-day flaw
Adobe has released an emergency security update for Acrobat Reader to fix a vulnerability, tracked as CVE-2026-34621, that has been exploited in zero-day attacks since at least
REPORT · WHAT · BleepingComputerOPEN STORY
13 Apr
Simply opening a PDF could trigger this Adobe Reader zero-day
Even though it’s patched, Adobe confirmed it was exploited in the wild, so updating is urgent, not optional.
REPORT · WHAT · Malwarebytes LabsOPEN STORY
7 Sept
Magento StyleSmuggler zero-day exploited to deploy Linux backdoor
A zero-day vulnerability dubbed "StyleSmuggler" affecting all versions of Magento and Adobe Commerce is being exploited in attacks to deploy a backdoor. [...]
REPORT · WHAT · BleepingComputerOPEN STORY
Sources
The Hacker News
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