17-Sep-2026 Cisco Zero-Day, Mandiant AI Worm and Maritime Cyber Threats

Hacked dAily is the first AI-driven cybersecurity podcast, created by Cytadel Cyber and published daily for CISOs, security leaders, and decision-makers. Today’s briefing covers five developments shaping cyber risk: 1. Coast Guard and FBI investigators boarded two foreign commercial vessels in the Gulf of Mexico after detecting signs of network compromise. Although no disruption, danger, or environmental impact was reported, the case highlights growing cyber risks to maritime operations, sanctioned trade, and global energy supply chains. 2. Cisco has released emergency fixes for a critical, actively exploited authentication-bypass flaw in Identity Services Engine and Passive Identity Connector. Organizations should patch immediately and review logs, as attackers may gain unauthorized access or root-level control. 3. Mandiant reports that a hijacked AI coding-assistant session helped spread the Shai-Hulud worm across roughly 100 software repositories. The incident exposed source code and secrets, demonstrating how AI-assisted development and poisoned dependencies can accelerate supply-chain attacks. 4. Spain’s data protection authority has reported what may be the first known personal data breach conducted by an AI agent. The incident shows that autonomous systems can chain login, probing, and data theft rapidly, increasing pressure to protect credentials and maintain human oversight. 5. CISA is urging critical infrastructure operators to deploy cyber decoys, including fake systems, accounts, and data. These low-cost tools can expose intruders earlier, support zero-trust strategies, and help under-resourced organizations detect attackers already inside their networks. Hacked Daily is sponsored by Cytadel, an offensive cyber assurance company specialising in AI-powered attacks. Cytadel’s expert-led Red Team Assessments follow real attack chains across people, identity and technology to verify whether they can become AI fraud or ransomware disruption. We verify your defences before attackers do. Learn more at cytadel.co.uk.