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Vulnerability

CVE-2026-34621: Adobe Acrobat Reader Zero-Day Exploited for 135 Days Before Patch — Full Attack Chain Analysis

Adobe’s emergency patch for CVE-2026-34621 arrived 135 days after threat actors began exploiting this critical zero-day in Adobe Reader. The attack uses a prototype pollution flaw to execute privileged JavaScript from a malicious PDF — no click required beyond opening the document. CISA has added it to KEV with an April 27 federal deadline. Here is the full technical breakdown.

#Critical#Cybersecurity#RCE#ThreatIntel#Vulnerability
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Vulnerability

CVE-2026-39987: Marimo Python Notebook RCE Exploited in Under 10 Hours — Full Technical Breakdown

A critical pre-authentication RCE vulnerability in Marimo, the open-source Python notebook platform, was weaponized by threat actors in under 10 hours of disclosure — with no public PoC available. Here is the full technical breakdown of the attack chain, attacker TTPs, and what defenders must do right now.

#Critical#CVE-2026-39987#Cybersecurity#Marimo#Python
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