SEC536: Adversarial AI - Penetration Testing AI Systems


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Contact UsWednesday, October 21, 2026 | 12 PM ET | Live on YouTube and LinkedIn | No registration required

Two critical vulnerabilities have been discovered in PHP, the technology powering millions of websites and applications worldwide. With severity ratings of 9.2 out of 10 and reports of potential remote code execution, these flaws could pose a serious threat to organizations around the world that use PHP. Emergency security patches are scheduled for release on October 21 at 10 AM ET.
Join SANS for this emergency livestream, featuring Moses Frost, Senior Instructor at SANS Institute, and Rich Greene, Certified Instructor and Senior Solutions Engineer at SANS Institute, who will cut through the noise and explain what we know about these vulnerabilities, which systems may be affected, and exactly what security teams should do now.
Get the facts, understand the risks, and take action to protect your organization.
Watch live Wednesday, October 21 at 12 PM ET. No registration. If you miss it, the replay will be available on this page and on the SANS YouTube channel. A CPE-eligible replay will be posted to the SANS on-demand platform within [24 to 48] hours.
Security Advisory: https://www.php.net/archive/2026.php#2026-10-21-5
Calif Blog: https://calif.io/php2shell/



Red team expert Moses Frost combines decades of offensive security experience with hands-on SANS training, helping students master cloud penetration testing and adversary simulation through real-world labs.
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Rich Greene, SANS Senior Solutions Engineer and SEC301 author, brings 20+ years of cyber operations and teaching experience to the classroom. With 15+ GIAC certifications and a passion for mentorship, he equips defenders with real-world confidence and skill.
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