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Week in review: Acrobat Reader flaw exploited, Claude Mythos offensive capabilities and limits

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Bringing governance and visibility to machine and AI identities In this Help Net Security interview, Archit Lohokare, CEO of AppViewX, explains how the rise of AI marked a turning point where machine and AI agent identities began converging into a single problem. Drawing on his experience across IBM and CyberArk, he describes the shift from human-dr…
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2 Articles

In a security note Adobe warns against active use of a gap in Acrobat and Reader. The CVSS value 8.6 is considered to be highly dangerous. However, Adobe considers the risk of the vulnerability CVE-2026-34621 itself as critical as it allows arbitrary code execution. The update is now ready and should be implemented immediately. Adobe published the security bulletin APSB26-43 on April 11, 2026 and confirmed active exploits for the critical vulner…

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Help Net Security broke the news on Sunday, April 19, 2026.
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